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Most Recent Product Questions
  1. Rated: 182
    10/10/2016 7:54 PM Baader UV/IR Cut / L-Filter
    What's the actual size of your 2" filters in "mm" with and without frame/ring? What step down adapter is suggested from a 52 mm to "-- mm"?

    Answer rated: 225
    Our largest cell mounted filters measure 2" (50.8mm) in mechanical diameter (having a metric thread of M48). The optical clear aperture is 46 mm. In order to ease the adaptation of our 2" filters onto most camera lenses, we do produce a 2" filter-holder, to convert from the ASTRO-2" Standard (M48) into a more common photo-standard of SP54 mm ("SP"means this is not a metric thread).
    For adapting any cell mounted Baader 2 inch Filter onto a camera lens with 52mm front filter thread you will need:
    #2408166 Baader DSLR 2" Filter-Holder M48 / SP54: https://www.baader-planetarium.com/en/baader-dslr-2%22-filter-holder-m48sp54.html
    #2958052 Baader Lens-Adapter-Ring SP54 / M52: https://www.baader-planetarium.com/en/baader-hyperion-dt-ring-sp54m52-for-dtadapter-iiandiii-and-hyperion-eyepieces.html
    Based on the SP54 thread, we offer many more adapters for various camera threads, our so-called Hyperion DT-rings. https://www.baader-planetarium.com/en/catalogsearch/result/?q=sp54
    Answer by: Baader Web Team (Admin) on Oct 11, 2016 5:08:00 PM
  2. Rated: 165
    2/6/2018 2:43 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I just purchased your Baader Clicklock SCL #2956233 for my Celestron C11. It screws on smoothly and tightens up very well to the C11 rear cell. Too well. It is very hard to remove once you snug it up. Is there a washer recommended to go between the Clicklock and the rear cell to make it easier to remove? Sometimes I need to reinstall the original visual back so I have SCT threads for my flip mirror.

    Answer rated: -2
    We do not have a washer, although one made of plastic would surely help - similar to our T-2 spacer-rings, which of course are much too small for this use-case. Most people leave the Clicklock-clamp always on the telescope.

    We do not have ready-made wahers, but to released stuck parts, we like to use sturdy rubber gloves which give you a better grip. Maybe they are also helpful for you.
    Answer by: Baader Web Team (Admin) on Feb 7, 2018 11:32:00 AM
  3. Rated: 81
    4/30/2017 11:39 PM Baader Ultra-Narrowband H-alpha 3,5nm Filter
    I've got filter set h-alpha,h-beta,sII,oIII for full frame ccd, when will arrive the filter size 1.25" for h-alpha 3.5nm?

    Answer rated: -25
    The H-alpha 3.5nm filter in 1.25" size will become available in approx. four months. Thanks for your patience
    Answer by: Baader Web Team (Admin) on May 2, 2017 8:24:00 AM
  4. Rated: 68
    11/1/2016 11:59 PM Baader H-alpha 7nm CCD Narrowband-Filter
    Do all Baader narrowband filter both UV and IR as well? I am thinking of using them with a Full Spectrum DSLR. Thanks.

    Answer rated: -28
    All Baader Planetarium narrowbandfilters are blocking UV and IR, they are made for use with fully unblocked monochrome cameras.
    Answer by: Baader Web Team (Admin) on Nov 2, 2016 3:43:00 PM
  5. Rated: 60
    12/1/2016 10:36 AM Baader Multi-Purpose Vario Finder 10x60 (single or with MQR-IV finder holder)
    Is the erecting prism, part no 2456130, compatible with the Vario Finder (Baader T-2 / 90° Baader Roof-Prism with BBHS ® coating (T-2 part #02), and can I use the supplied eyepiece with this combination?

    Answer rated: 41
    Yes, the T-2 90° BBHS prism is perfectly compatible with the Vario-Finder. The supplied eyepiece of the Vario Finder can be screwed directly into the housing of the erecting star diagonal.
    Answer by: Baader Web Team (Admin) on Dec 2, 2016 12:03:00 PM
  6. Rated: 60
    12/19/2017 5:04 AM Baader SC / HD Ultra Short T-Adaptor, 9mm optical length
    I'm trying to connect a Mallincam DS2.3+ to a Hyperion Mark III Zoom 8-24mm. The DS2.3+ has what seems like a M25f thread. What adapter rings are required?

    Answer rated: -42
    The Malincam comes with a C-Mount thread so you´ll need this two adapters because the EP has M43 thread:
    http://www.baader-planetarium.com/en/baader-c-mount-t-2-with-integrated-1%C2%BC%22-filterholder.html
    http://www.baader-planetarium.com/en/baader-hyperion-t-adapter-m43i--t-2a-(m42x0.75).html
    A lot more possibilities for adaptions you can see here (especially the last page for the video modules):
    http://www.baader-planetarium.com/en/downloads/dl/file/id/444/product/2848/digiscoping_camera_adaptations_for_afocal_photography_and_eyepiece_projection.pdf

    Answer by: Baader Web Team (Admin) on Dec 19, 2017 10:18:00 AM
  7. Rated: 58
    8/14/2017 11:46 AM Solar Viewer AstroSolar® Silver/Gold (1pc, 10pc, 25pc, 100pc)
    Wrinkles, folds, creases - is my Baader AstroSolar Viewer safe?

    Answer rated: 4
    Your AstroSolar Viewer is perfectly safe. Each single viewer has been safety-tested and is tucked into it's own protective poly-bag. After each time you used it put it back into it's poly bag and it will serve you for years to come (the next total eclipse in the US will commence on April 8th 2024).

    Like published many times for AstroSolar Film, the film is mounted loosely in it's paper frame to retain the ultra high quality which AstroSolar is known for. When looking at the film you might have the impression it would show wrinkles - and this is perfectly normal and that's how it ought to be. All our product images do show how this will look like. Wrinkles in this case are a sign that the film is mounted correctly. What we do not let pass though are real folds and creases in the metal film. Even these will not be dangerous in the least - but they could impair the high optical quality of the solar image.

    Do not let the viewer fall into dirt, do not let it collect dust over some weeks, do not put it flat on a table while rubbing it back and forth - that is - do not violently scratch off the metal coating visible at the front side. AstroSolar film is metallized on both sides. Even some scratches on the front side will not be dangerous for your eyes! This material has a 25 years history and we stand behind it. In addition, the special (non-soot) black film that complements the metal film will work as an added safety layer and definitely the combination of materials will keep your eyes out of harm.

    Even so we do insist that each viewer must be tested by you as well before each use, to check if any changes have appeared over time due to wrong handling or improper storage. If your viewer is torn from age or use, if it shows bright pinpoints during a short glimpse towards the sun, then discharge it and get a new one.

    Answer by: Baader Web Team (Admin) on Aug 15, 2017 9:49:00 AM
  8. Rated: 58
    11/22/2017 3:00 PM SET: Hyperion Universal Zoom Mark IV + Hyperion Barlow 2,25x (8-24mm / 3,6-10,7mm)
    Why is the Barlow not compatible with spotting scopes

    Answer rated: 2
    Spotting scopes do not work with all eyepieces, because they don't offer the same back-focus like an astronomical telescope. We had to shorten the housing of the Zoom eyepiece to get into focus with all spotting scopes. You really have to fight for every millimeter.

    The problem is that the front lens of the scope basically creates an image in a given distance, which is then magnified by the eyepiece. So, you need to get the eyepiece close enough to the front lens. In a spottin scope, the erect-image prism is mounted fix inside of the tube, and you can't get close enough. In a telescope, you can move both prism and eyepiece closer to the front lens.

    While a Barlow lense moves the image further to the outside, it has to be even closer to the front lens than an eyepiece - with a refracting spotting scope, you'd have to remove parts of the scope's housing to get into focus. The prism and the internal focusing mechanism are in the way...

    So, although you can attach the Barlow mechanically to a spotting scope, you wouldn't be able to reach focus and get a sharp image.

    Only if you use a telescope as spotting scope like our C5 Schmidt-Cassegrain spotting scope, you'd be able to use the Barlow - but this only works with a very small number of spotting scopes.
    Answer by: Baader Web Team (Admin) on Nov 22, 2017 3:01:00 PM
  9. Rated: 55
    9/18/2017 8:33 AM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    Please tell me how can I connect the 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons) and the camera QHY 163m. Is there any ready-made solutions. If not, how to calculate the adapter? Thank you.

    Answer rated: 42
    it is quite hard to find data about the back-focus of the QHY 163M camera as their manual is not online, but it seems to be 18mm. The MPCC is designed for a distance of 55mm +/-1mm between its T-2-thread and the sensor, so you need a spacer with a length of 37mm.
    You can achieve this easily with the
    Baader VariLock 46, lockable T-2 ExtensionTube 29-46mm with spanner tool (T-2 part #25V) #2956946 ( http://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/astro-t2-system/baader-varilock-46-lockable-t-2-extensiontube-29-46mm-with-spanner-tool-(t-2-part-25v).html )
    Please check the camera manual if the back-focus measured from the T-2-thread is 18mm. If it is different, you can use either the Varilock 46 (for 29-46mm) or the VariLock 29 (for 20-29mm).
    Answer by: Baader Web Team (Admin) on Sep 18, 2017 8:35:00 AM
  10. Rated: 52
    9/20/2017 12:55 PM Methanfilter 1¼" (889nm, 8nm)
    What are the threads and pitch of your 1.25" and 2" filters?

    Answer rated: 92
    Our 1.25" filters have a M28.5 male (and M28.5 front female) thread / our 2" filters have a M48 male (and M48 front female) thread

    Both thread sizes come with our proprietary pitch - which is not the same for the female and male threads.
    This is our own proprietary "emergency solution" for uniting a world were manufacturers all over the world copy from each other - to the point that there are almost a dozen different pitches in use for male and female threads. Traditionally US-companies used to do a UNF-based pitch and the rest of the world went for metric threads - but these do vary from 0.5 to 0.75.

    For this reason it does not make sense to publish our non standard pitch because our pitch is made to cope with all existing metric and US-pitch standards - and as said - our solution has evolved from sheer necessity. It is a mixture of a queer pitch and under-/over-dimensioning . We will not want to declare this as a standard and get bashed up for it. It works for us and is a result of 20 years adaptation to fit our filters onto all crazy threads we have seen. And inspite of this - every now and then there comes another "dragonboat-eyepiece" were even our filters may not fit...
    Answer by: Baader Web Team (Admin) on Sep 22, 2017 1:43:00 PM
  11. Rated: 44
    3/27/2017 3:18 PM Optical Wonder™ Set (Cleaning Fluid and Cloth)
    Is this sutible for expensive camera lenses etc? Thanks

    Answer rated: -27
    Optical wonder is used to clean world´s most expensive astronomical mirror surfaces. It certainly is good for cleaning hard coatings of camera lenses.
    Greatest care has to be taken to not "drown" the front lens in too much cleaning fluid and have the fluid flood all the lens from above. Only put Optical wonder onto the cleaning cloth when preparing the cleaning operation.
    Please also read the instructions found under the tab "Downloads": http://www.baader-planetarium.com/en/downloads/dl/file/id/110/product/1661/cleaning_and_maintenance_of_optics_a_short_instruction_guide.pdf
    Answer by: Baader Web Team (Admin) on Mar 27, 2017 3:42:00 PM
  12. Rated: 44
    7/30/2018 4:37 AM Bundle: Hyperion Universal Zoom Mark IV with Hyperion-Barlow 2.25x (8-24mm / 3.6-10.7mm)
    do you have an adapter that will attach Mark 4 zoom to a Sony FDR AX53 movie camera? It provides a 55mm filter thread to attach to the camera.
    Thanks Jamie Pauley purchasing through Adorama in the US.

    Answer rated: 3
    To attach a camera with 55mm Filter thread, you need
    Baader Hyperion Zoom M43 / SP54 Adapter # 2958086
    Baader Hyperion DT-Ring SP54/M55 for DT Adapter II&III and Hyperion Eyepieces # 2958055

    Answer by: Baader Web Team (Admin) on Jul 30, 2018 8:56:00 AM
  13. Rated: 43
    11/19/2020 2:01 PM Baader 2" ClickLock Diagonal Mirror
    I have a 2” clicklock star diagonal which has had the 2” telescope side nosepiece damaged. Is it possible to purchase a new 2” nosepiece separately?

    John.

    Answer rated: 4
    Yes, of course. They are available individually with safety kerfs (included with all Baader 2" prisms/mirrors as standard since about one year):
    https://www.baader-planetarium.com/en/baader-2%22-safety-kerf-nosepiece-with-2%22-filter-thread.html
    or also as traditional nosepiece with undercut (included with previous versions):
    https://www.baader-planetarium.com/en/baader-2%22-nosepiece-with-2%22-filter-thread.html
    Answer by: Baader Web Team (Admin) on Nov 20, 2020 11:17:00 AM
  14. Rated: 42
    9/30/2018 4:18 PM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    Is this eyepiece parafocal as you move between click stops?

    Answer rated: 36
    We recommend that you focus at high power and then zoom out. Usually, you do not have to adjust the focus then, or only a little bit - this depends also on the possibility of your eyes for accomodation. In any way, there will not much refocussing be necessary - usually it's only the testing to see if you really have already achieved the best focus.
    Answer by: Baader Web Team (Admin) on Oct 1, 2018 9:18:00 AM
  15. Rated: 42
    2/8/2017 4:32 AM Baader SC / HD Ultra Short T-Adaptor, 9mm optical length
    I have recently bought this product to help me get a very short connection for my T2 Zeiss prism to my C9.25 SCT rear port. I find that the two "rings" rotate freely with each other - is it normal? Or is this adapter supposed to be a fixed single piece with no rotating components? I am trying to figure out the best way to tighten this to the rest of my system, so that heavy accessories espcially like binoviewers won't rotate freely by accident!

    Answer rated: -25
    This is indeed normal and intended behaviour. The two rings rotate freely exactly for the purpose of being able to align your accessories as preferred. However: when you completely tighten it onto your C9.25 SCT rear port, it will be pressure-locked and wont rotate anymore.
    Answer by: Baader Web Team (Admin) on Feb 8, 2017 3:42:00 PM
  16. Rated: 40
    3/6/2017 9:34 AM Baader Neodymium (Moon & Skyglow) Filter
    I note that you do not provide either the Neodymium Filter nor the IR-Pass Filter in a version that is 'Square 50 x 50mm unmounted', is this correct?
    In relation to both Filters' Wavelength Spectrum Response what alternative Filter(s) do you have that has the nearest spectrum response in the 50 x 50mm unmounted version? Preferably 3mm thickness.
    The reason for this enquiry is to have a useful 'Luminesence' filter for Lunar and Planetary Astrophotography when the rest of the filters are for Deep Sky Imaging (Baader CCD Complete Filter Set II 50 x 50mm #2459544).

    Answer rated: 26
    To make it short, unfortunately we currently don't offer either in 50x50 with 3mm thickness because it will dim image compared to our 2mm substate thickness filters.

    Answer in detail: We are sorry, we never felt the Neodymium-Filter to be of intense enough value for CCD-imaging (but very nice for planetary lucky imaging!), hence it is being handled as perfect visual/videography filter here and only av. cell-mounted in 1 1/4" and 2" (2" being a size which already does serve well for DSLR-imaging and were we have all adapters available to put this filter in front of any DSLR-camera lens - or to use our UFC- filter changer for mounting it in front of any CCD-camera.

    The neodymium substrate will become very expensive in 50x50 x3 mm size and we already must go through a lot of glass to cancel out substrates with striae and other pouring defects. If you find someone offering this substrate in that size and thickness, you should very carefully check it for optical defects as most people do not do this careful glass selection, nor do they polish each filter substrate on an auto-deck-polisher, nor do they apply a truly high efficient BBAR-coating on both sides. Actually most are just usurping the name of the substrate while supplying very mediocre optical quality.

    If you have evidence of people using our smaller neodymium-filters successfully as "L-filter" substitute in a regular CCD-camera filter wheel, then please let us see the links. If it is reasonable we may enter into such a project - but the resulting price may be double of a cell-mounted 2" filter. Also keep in mind that the 1 mm added thickness will definitely cause some loss in transmission!

    Regarding the IR-pass-filter in 2 mm thickness: These are perfect for lucky imaging/videography. Hence 95% of these filters are being sold in the 1 1/4" cell-mounted version in 2 mm thickness. Again - offering this in 3 mm thickness will reduce transmission and not offer enough benefit for regular CCD-imaging (just our 2 ct´s).
    Answer by: Baader Web Team (Admin) on Mar 6, 2017 9:35:00 AM
  17. Rated: 40
    7/27/2020 3:16 PM Hyperion Zoom 2.25x Barlow lens
    Will this Barlow fit the space between the Hyperion Zoom and the 2" ClickLock Mirror Diagonal when the zoom lens has been directly connected to the diagonal with the 2i to 2a change ring?

    Answer rated: 12
    No, this would be too long to fit.
    Answer by: Baader Web Team (Admin) on Jul 28, 2020 11:21:00 AM
  18. Rated: 40
    10/2/2022 6:08 AM Baader 2" ClickLock Diagonal Mirror
    In the description of the Baader 2" ClickLock Diagonal Mirror it shows the 2" nosepiece screws into a S58 dovetail.
    I can't seem to find the S58 dovetail replacement on your website. is there an alternative or upgraded version of this?

    Answer rated: 3
    I'm not sure which replacement you are talking about. The 2"-nose piece is Baader 2" Safety Kerf nosepiece with 2" filter thread # 2408156
    Or are you talking about Baader M55a/M68a Adapter for all 2" Baader mirrors and prisms # 2956110?
    Answer by: Baader Web Team (Admin) on Oct 4, 2022 12:08:00 PM
  19. Rated: 39
    12/12/2020 2:23 PM 2" Glasspathcorrector® 1,7x for Newtons incl. T-2 change ring
    Hello. I'd like to use this corrector with William Optics binocular. I need some additional T2 connector between the corrector and bino. Is there a way to make it work?

    Greetings


    Answer rated: -6
    We are sorry but we do not have adapters for William Optics bino-viewers and dont know their design good enough. If it has got a 2" filter thread, maybe you can use Baader Expanding Ring T-2f / M48m (T-2 part #29) # 2458110 - but this will bring the glasspath corrector much farther away from the bino than desired, thus increasing the magnification even further.
    Answer by: Baader Web Team (Admin) on Dec 14, 2020 9:30:00 AM
  20. Rated: 38
    9/1/2016 11:51 PM
    What is the difference between ACF and BCF?

    Answer rated: -13
    The ACF filters are for the first generation of Canon Cameras only, all newer ones (from40D on) need the BCF filters. The ACF is a full thickness glass stack, the BCF is a thin filter exchanging only one part of the original filter stack. The specs / functionalites of ACF/BCF filters are the same, only the size / thickness are different.
    Answer by: Martin Rietze (Admin) on Sep 5, 2016 9:31:00 AM
  21. Rated: 37
    1/18/2017 11:53 PM 2" Glasspathcorrector® 1,7x for Newtons
    Is it possible to stack GPC's without losing image quality?

    For example, a 1,25x or 1,70 GPC on top of the 1,7x newtonian GPC with a Mark V binoviewer. That would give a nice flexibility.

    Answer rated: -8
    Sorry, GPCs are not designed to be stacked. Dual stacking will create spherical aberration - unfortunately we cannot recommend it.
    Answer by: Baader Web Team (Admin) on Jan 19, 2017 5:04:00 PM
  22. Rated: 36
    6/21/2021 9:07 PM Baader K-Line Filter 1¼" (double stacked)
    Can i use this filter with my Baader Herschell Helioscope ?

    Answer rated: -5
    Yes - but only for photography! The K-Line filter is NOT FOR VISUAL USE!
    Answer by: Baader Web Team (Admin) on Jun 22, 2021 9:02:00 AM
  23. Rated: 35
    10/6/2016 8:38 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    What is the optical length for this product (Baader 2" ClickLock CL-SC-Clamp 2956220) ?

    Answer rated: 15
    The optical height of the SC-clamp is 47mm. Please note the technical image to our 2" ClickLock System. Its the first image linked under "Application Images". More ClickLock clamps are in production.
    Answer by: Baader Web Team (Admin) on Oct 10, 2016 10:08:00 AM
  24. Rated: 35
    8/20/2022 1:18 PM Baader D-ERF Energy Rejection Filter (75 - 180mm)
    I ask for another information on the use of the d-erf filter, I see that many amateurs and builders mount it in small format internally near the focus point to save money, I think instead it is better to mount it externally in front of the lens to prevent the telescope warm up internally, are both solutions valid?

    Answer rated: 14
    A Energy Rejection Filter always has to go on front of the optics to prevent the full solar energy from entering the telescope, hence the name. To place it inside the telescope right before the focus point, where the solar energy will hit the filter in a combined way at full force is in our opinion dangerously negligent. We stronly advise against such experiments! Solar Safety is not the place where one should safe money. If such a wrongfully place ERF filter breaks due to the solar force and the light enters your eyes, you might become blind or permanently damage your eyes.
    Thank you for asking and for already stating that you don't think this is the best way. You're completely right!
    Answer by: Baader Web Team (Admin) on Aug 22, 2022 8:18:00 AM
  25. Rated: 34
    12/25/2020 3:45 PM Fluorite Flatfield Converter (FFC) / 3x-8x
    With a classical Cassegrain such as Orion CC 6 inch Dia 1800 mm focal f12 and focal plane fixed at 6 inch from rear mirror approx would this FFC be practical at all ?

    Answer rated: 21
    You can find a diagram in the gallery of the product images which shows you the position of the FFC and the new focal plane in relation to the original focal point of the telescope. E.g., if you use it at 3x, the FFC moves 14,7mm inwards (that's the value of L), and you need extension tubes for 96mm (that's the value of L').
    For 8x, you need ca. 27mm of inward travel.
    This should help you to determine if you have enough back focus.
    On the other hand, you should check the pixel size of your camera to see if you are oversampling when using the telescope at at least f/36. Today, some cameras have such small pixels that they already work fine at f/15-f/20. The perfect focal ratio depends on the camera pixels. There are several articles online about this, just google e.g. "matching your camera to your optics" for a lot of information.
    Answer by: Baader Web Team (Admin) on Jan 8, 2021 9:42:00 AM
  26. Rated: 34
    10/7/2016 1:08 PM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    I purchased the Hyperion Zoom and the MPCC Mark III. Can you tell me how to adapt the eyepiece to the coma corrector?
    I also want to use other eyepieces. How do I know the right distance between fieldstop position and the MPCC?

    Answer rated: 22
    We found this question very important and wrote an extensive answer with application images for other customers with similar question. Please check out the following blog post: "Perfect Coma Correction with Baader-MPCC – But how to adapt eyepieces?"
    http://www.baader-planetarium.com/en/blog/perfect-coma-correction-with-baader-mpcc-but-how-to-adapt-eyepieces/
    Answer by: Baader Web Team (Admin) on Oct 12, 2016 2:37:00 PM
  27. Rated: 34
    12/10/2017 8:12 PM Baader T-2 / 7.5 mm Extension Tube (T-2 part #25C)
    I need a lockable T-2 extension, total length about 10 mm (for use with the Geoptik CCD-Canon connector). Can the 7.5 mm T-2 extension be combined with the #33 locking ring to achieve this? If not, is there another T-2 system item(s) for this? Thanks.

    Answer rated: 5
    Unfortunately, you can't combine these two parts this way. But the male and female threads of this adapter are ca. 5mm long, so I'd recommend that you use e.g. two 1.4mm T-2 spacer rings from the set #2458102 and put one on each side of the adapter. This way, you get very close to 10mm without loosing much of the threads - so you still have a secure connection to your camera.
    Answer by: Baader Web Team (Admin) on Dec 11, 2017 9:35:00 AM
  28. Rated: 33
    2/3/2019 12:35 AM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    Hi, I would like to know if the 2" BDS-SC Baader Diamond Steeltrack® Focuser fits to my NexStar SE SCT 6".Best Regards Fermín

    Answer rated: 20
    Yes, you can attach the Steeltrack to a 6" Schmidt-Cassegrain, but to do so, you have to remove the rubber cover from the telescope's focussing knob. Then you'll have enough space for the SteelTrack. Unfortunately, there is not enough space between the Steeltrack and the brass focussing drive of the 6" Schmidt-Cassegrain to reattach the rubber cover; but you don't need it once the Steeltrack focuser is attached.
    Answer by: Baader Web Team (Admin) on Feb 4, 2019 8:32:00 AM
  29. Rated: 33
    1/5/2021 3:55 PM Alan Gee Telecompressor Mark II (T-2 part #20)
    Will this work with a Celestron C11 with the Baader 2” click lock visual back?

    Answer rated: 18
    There are several ways of adapting the Alan Gee to a telescope described in the manual at https://www.baader-planetarium.com/en/downloads/dl/file/id/213/product/1197/baader_alan_gee_ii_telecompresor_shapley_lens_f_5_9_manual_and_applications.pdf

    You could e.g. use Baader T Adapter (BTA) for SC and MAK Telescopes (T-2 part #21) # 2408160 and Baader Expansion Ring 2"a/T-2i with 1mm optical path length (T-2 part #28) # 2958242.

    But please remember two things: The compressing factor of the Alan Gee depends on the distance to camera or eyepiece, and it is designed to be used inside of the baffle of a Schmidt-Cassegrain, only then it will deliver the best results (which is mainly important for photography). If you want to use it with a 2" star diagonal, we recommnd that you use it as described in the manual between the nosepiece and the body of the star diagonal. If you want to proceed with T-2, we recommend the Universal Alan Gee II - Telecompressor (UAG II) # 2454405 which combines the Alan Gee optics with a 2" nose piece and a T-thread.
    Answer by: Baader Web Team (Admin) on Jan 7, 2021 9:18:00 AM
  30. Rated: 33
    12/1/2021 3:26 PM Baader T-2 Stardiagonal (Zeiss) Prism with BBHS ® coating (T-2 part #01B)
    Is this the smallest of its kind of 2 diagonals?

    Answer rated: 5
    No - the smallest diagonal (prism) is this one https://www.baader-planetarium.com/en/accessories/optical-accessories/prism-and-mirror-star-diagonals/baader-prism-diagonal-t-290%C2%B0-32mm.html r
    Answer by: Baader Web Team (Admin) on Dec 2, 2021 9:47:00 AM
  31. Rated: 31
    9/8/2016 8:02 PM Baader 2" ClickLock Diagonal Mirror
    Is the housing for this diagonal CNC machined? And what features are there that ensure proper alignment of the mirror? What are the features of the mirror glass?

    Answer rated: 32
    The mirror seat of the diagonal body is machined, to provide a defined position.
    We do regard the mirror substrate of our dielectric diagonals a proprietory information. As you may have heard, a dielectric coating with as much as 50 coating layers can extend an enormous amount of stress onto the mirror substrate. Many proudly offered dielectric mirrors suffer under "power" - means the surface bends under the coating stress and over time develops a very weak spherical shape. For this reason we use a hardened variety of borosilicate glass, which can sustain the plane polished surface to remain in perfect order. Admittedly this substrate has somewhat larger index of expansion and does take longer to regain its optical shape when subjected to large temperature differences - but only when compared to our BBHS mirror-diagonals which feature a hard-silver coated glass-ceramics (Astro-Sitall) as substrate.
    However - we had extensively tested this combo of coating and substrate to be a perfect match for our dielectric diagonals - especially ensuring a longlived product that does not change in optical quality over time. Please read more about the mechanical and optical properties of our BBHS-diagonals, as well as our marketing philosophy, to not participate in the usual number competition here: http://www.baader-planetarium.com/en/blog/baader-bbhs-reflective-properties/
    Answer by: Baader Web Team (Admin) on Sep 14, 2016 11:09:00 AM
  32. Rated: 31
    11/28/2021 11:23 AM Baader 2" ClickLock Diagonal Mirror
    Does the mirror diagonal reflect or pass through the UV/IR into the diagonal aluminum housing?

    I want to use a petzval refractor for H-alpha solar observing with a dedicated solar filter. It is in general recommended not to use an UV/IR cut filter before the diagonal, since UV/IR reflections can come to focus in the petzval rear glass elements and harm the scope. If it rejects UV/IR by passing UV/IR into the diagonal housing, this is a big sales argument for the dielectric mirror when using a petzval scope.

    Best regards
    Thomas

    Answer rated: 3
    Thank you. We are aware of this benefit of "not trransmitting UV and IR wavelenghts for H-alpha observation". For this reason we emphasize this fact in the description of this dielectric mirror.
    Answer by: Baader Web Team (Admin) on Nov 29, 2021 3:05:00 PM
  33. Rated: 31
    3/10/2021 9:30 AM Bundle: Hyperion Universal Zoom Mark IV with Hyperion-Barlow 2.25x (8-24mm / 3.6-10.7mm)
    Hello,
    I would like to know if it is possible to use the 2” astro-nosepiece with SC male thread (n°3 on p.20 of instruction manual) to fix my Canon EOS on the telescope directly with a supplemental EOS ring ?
    Thank you for your reply

    Answer rated: 6
    Yes, but... Of course, you could make a dedicated reducer from S52-ring dovetail to SC-thread (that is, if you use one of our Wide-T-rings), but it would be cheaper to simlpy buy a 2" / S52 Nosepiece # 2958551.
    If you have a standard T-ring (with M42x0.75-thread), then the thread is smaller than the nosepiece. You could use Baader Reducing-Ring 2"i / T-2a, with 1.5mm optical length # 2958244 to attach the nosepiece to the T-ring, but this wouls be 1,5mm longer than a dedicated nosepiece Baader 2" nosepiece to T-2 / M48 (T-2 part #16) # 2408150 and not much cheaper, too.
    dependng on the size of your camer sensor, it would be better to buy a Wide T-ring and a matching nosepiece to avoid vignetting, which will occur on a full-frame-camera when you are limited to T-2.
    Answer by: Baader Web Team (Admin) on Mar 11, 2021 12:55:00 PM
  34. Rated: 30
    3/23/2018 10:15 PM Baader T Adapter (BTA) for SC and MAK Telescopes (T-2 part #21)
    I am interested in getting the Alan Gee Telecompressor, and would like to mount it using this Baader T Adapter (T-2 part #21). However, I also have the #2956220 SC / HD-Clicklock Eyepiece clamp for my Celestron SCT 9.25. I wonder if I can attach the Alan Gee to the T-2 Part #21 and then have the #2956220 Clicklock on top of it, to make it really easy to change from visual to astrophotography applications. What are additional components that I would need to reach focus with a ZWO ASI224MC Camera?

    Thank you for your help!

    Answer rated: 4
    Please note that the recommended distance between Alan Gee and the field stop of an eyepiece or a camera sensor is 121mm. It should not be much further away than ca. 130mm, otherwise the quality may suffer.

    The 2" SC/HD-Clicklock has got a length of 47mm, our 2"-mirrors ca 112mm, our 2" prisms about 100mm (both including their clicklock eyepiece clamps) and our 1.25"-T-2-prism 64mm incl. eyepiece clamp. So, it is okay if you use a 1.25" star diagonal, but with a 2" star diagonal, the Alan Gee will be too far away from the eyepiece.

    You can use the BTA (#21) and the Expanding Ring T-2f / M48m (T-2 part #29) #2458110 (optical length: 2.5mm) to attach the Clicklock to the BTA. But we'd recommend this only for 1.25" star diagonals.

    The ASI has got a backfocus of 12.5mm from the T-2-thread, so you need ca. 108.5mm of distance.

    If you attach the camera *directly to the BTA*, this can be achieved e.g. with
    - 2x 40mm T-2-extension tube (T-2 part #25B) #1508153
    - VariLock 46, lockable T-2 ExtensionTube 29-46mm (T-2 part #25V) #2956946
    This will give you a length of 109mm, or if you want the more precise, you can use
    - 1x 40mm tube
    - 2x 15mm tubes (#1508154)
    - 1x VariLock 46
    to give you 99-116mm.

    If you mount the Alan Gee in *front of the Clicklock*, you need e.g.:
    - Expanding Ring T-2f / M48m (T-2 part #29) #2458110 - optical length: 2.5mm
    - 2" SC-Clicklock - 47mm
    - Baader 2" / T-2 Nose Piece (T-2 part #16) # 2408150 - optical length: 2.5mm
    - 2 x 15mm T-2-extension tube (T-2 part #25A) # 1508154 - 30mm
    - Baader VariLock 29, 20-29mm (T-2 part #25Y) # 2956929 - set to 26.5mm
    - ASI cam - 12.5 mm
    This will give you the desired working distance of 121mm.
    Answer by: Baader Web Team (Admin) on Mar 26, 2018 11:55:00 AM
  35. Rated: 30
    11/9/2016 10:31 AM 2" Amici-Prisma 90°, beidseitig mit 2" Steckanschluss
    I have some questions regarding your Amici-prism 2" diagonal:

    1. Does it really have only 30 mm clear aperture? Is it not too small for 2" eyepieces like Nagler 31 mm (42 mm fieldstop)? No vignetting?

    2. What is the length of the light path in this diagonal?

    3. I'm thinking about using this diagonal in a 80/400 refractor, with Teleskop-Service flattener TSFlat2 (http://www.teleskop-express.de/shop/product_info.php/info/p1010_TS-Optics-Universal-APO-Flattener-TSFLAT2-fuer-Refraktor-Teleskope.html), which has normal 2" filter thread. Can the nosepiece of the diagonal be unscrewed, and the flattener screwed to the body of the diagonal itself? (so the flattener would work as a nosepiece). In the description there is the information that "innenanschluss" is M48 thread, and this - I think - is equal to standard 2" filter thread...
    Kind regards, Piotr Kierzkowski

    Answer rated: 0
    This 2" Amici has got indeed a clear aperture of ca. 38mm, so it should work quite well with your eyepiece. Unfortunately, we do not have the data about the light path at hand.

    The nosepiece on the telescope-side can be removed, the housing has got an M48-filterthread, too. Only the eyepiece clamp can't be removed.
    Answer by: Baader Web Team (Admin) on Nov 9, 2016 2:58:00 PM
  36. Rated: 30
    5/20/2017 3:00 PM Baader Multi-Purpose Vario Finder 10x60 (single or with MQR-IV finder holder)
    The Baader Vario Finder #2957460 Specification details do not indicate its' weight.
    What is the weight please for the Counterweight calculation.

    Answer rated: 21
    The Variofinder itself weighs 850g, the optional MQR IV finder bracket weighs an additional 350g.
    Answer by: Baader Web Team (Admin) on May 22, 2017 1:32:00 PM
  37. Rated: 30
    2/9/2021 2:55 AM Baader Neodymium (Moon & Skyglow) Filter
    What is the minimum focal ratio that will still allow this filter to work properly?
    I'm thinking here about very short focal ratio systems, such as the Hyperstar, which can operate at f/2.

    Answer rated: 21
    The filter works with f/2 systems
    Answer by: Baader Web Team (Admin) on Feb 9, 2021 8:17:00 AM
  38. Rated: 29
    9/9/2020 2:01 PM Carl Zeiss 1¼" Abbe Barlow lens 2x
    Dear Sir,
    I use a Baader T-2 prism diagonal with a 1,25" clicklock eyepiece adapter.If I insert the Zeiss Abbe barlow lens into this clicklock will this not hit the prism inside the diagonal? I ask because the 1.25" sleve of this barlow seems much longer than the 1.25" clicklock eyepiece adapter I use??
    Thank you very much!
    Best Regards

    Answer rated: 5
    It is indeed too long - the lens is about 12mm longer than the top of the T-thread.
    If you want to use it with a 1.25"-prism, you could use
    Baader T-2 / 15 mm Extension Tube (T-2 part #25A) # 1508154
    Answer by: Baader Web Team (Admin) on Sep 9, 2020 4:15:00 PM
  39. Rated: 29
    3/28/2017 8:13 PM Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
    Tell me, please, what is the best diagonal to choose for observing objects of distant cosmos and planets:
    Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
    Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp
    And yet, the mass of them is indicated the same, is there any error here? The prism should be heavier? Thank you for your responses!

    Answer rated: 14
    There was indeed an error in the specs, the mirror weighs 451g and the prisms weighs 513g. Regarding your question which to choose:
    Usually prism diagonals are better suited for long focal length refractors and mirror diagonals for short focal length mirror telescopes.
    This is because the total reflection with prisms is suboptimal when using short focal lengths due to nonlinear light reduction with high angle side light rays and chromatic prism effects. Also there are shifts in backfocus and it can influence the correction of high quality optics due to the glasspath (the speed of light is lower inside a dense medium like glass in comparison to air).
    On the other side mirrors don't have the same maximum reflection values like a prism's lossless physical total reflection. Also a mirror is much more sensitive to transmission reduction when exposed to the air (sensitive silver layer getting weak very soon).
    But with the Baader BBHS self protecting silver reflection layer on both diagonals (mirror and prism) the backsides of both principles are well compensated, this means the mirror diagonal will not loose any light due to aging anymore and the general light angle sensitivity of the prism diagonal due to reliance on total reflection alone is compensated by the additional BBHS layer below the total reflection hypotenuse area.
    So the decision between diagonal mirror or prism is not as critical as it was until now.
    But still a short focal length instrument favours a mirror diagonal.
    Answer by: Baader Web Team (Admin) on Mar 29, 2017 10:49:00 AM
  40. Rated: 29
    12/7/2021 3:23 PM Baader UFC (Universal Filter Changer)
    I would like to use 65mm suqare filter in fornt of camera lens. Do you have 65mm suquare holder? If not, please let me know how to fix 65mm suqare filter for several camera lens. Thank you.

    Answer rated: -8
    We are very sorry, we do not offer filter holders for 65mm filters in front of camera lenses
    Answer by: Baader Web Team (Admin) on Dec 10, 2021 9:43:00 AM
  41. Rated: 29
    8/23/2019 7:13 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I have a Zeiss Telementor telescope with a Zeiss M44 prism diagonal. I want to use 2" eyepieces with my diagonal. Can you supply a 2" click-lock eyepiece holder with a male M44 thread connector?

    Answer rated: 10
    This is possible by combining our 2" / T-2 ClickLock #2956242 with our M44 / T-2 Zeiss adapter #1508005
    https://www.baader-planetarium.com/en/baader-zeiss-camera-adapter-m44t-2.html
    Answer by: Baader Web Team (Admin) on Aug 26, 2019 8:44:00 AM
  42. Rated: 29
    5/24/2017 9:35 PM 2" BDS-RT Baader Diamond Steeltrack Focuser
    Is there an RT adapter to fit a Steeltrack focuser to a Skywatcher EQUINOX 80 please?
    Thanks, Paul

    Answer rated: -30
    We would love to see our Diamond Steeltrack on as many telescopes as possible. However we cant answer this question for certain, since we don't sell this telescope and thus don't know the thread sizes, backfocus and so on. You could send us your scope and we would inspect it and check if we have a fitting adapter - if not we could produce one.
    If you don't want to send us your scope, we would need precise measurements of the thread sizes / pitch as well as measurements or specs from your telescope to evaluate the backfocus. Please send images of all measuring steps.
    Answer by: Baader Web Team (Admin) on May 26, 2017 1:30:00 PM
  43. Rated: 29
    11/10/2018 3:52 PM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    Is any adapter available that allows this eyepiece to be used on the Opticron MM4 60ED spotting scope?

    Answer rated: 22
    Yes, this adapter is now available! See here:
    https://www.baader-planetarium.com/en/2%22a--m41-5-zero-length-reducing-piece-(no-optical-height).html
    Answer by: Baader Web Team (Admin) on Nov 15, 2018 11:56:00 AM
  44. Rated: 29
    7/3/2017 4:49 PM Baader Neodymium (Moon & Skyglow) Filter
    Hi I have a Canon 5D modified with the stock IR filter removed making it full spectrum imager. I need a standard 2" threaded IR cut filter to block the unwanted IR while leaving the Ha intact, I could purchase your Baader UV-IR-CUT Filter for this purpose but wonder if the Moon and sky-glow filter would serve dual duty to cut the unwanted IR while also preforming as a LPF with the additional benefit of lunar and Planetary enhancement. Lastly would the Moon and Sky Glow filter degrade deep sky imaging at dark sky locations thus making a case for the need of both filters?

    Answer rated: -10
    The Moon and Skyglow filter can be used as UV/IR blocker, that is correct. And it also has some LPR function (which is of course not as strong as with a full Deep Sky UHC Filter). This means it will degrade the efficiency at dark sky locations not as strong as with a real UHC filter.

    But - it will mean you have:
    -not the maximum deep sky contrast in light polluted areas
    -not the maximum efficiency in really dark areas
    ->therefore separate filters, a UHC and a UV/IR blocker and maybe the Moon&Skyglow for planetary work are the better solution.

    So if imaging efficiency is not your main intention and a compromise is ok you can choose the Moon&Skyglow alone. Otherwise we recommend separate ones.
    Answer by: Baader Web Team (Admin) on Jul 6, 2017 12:26:00 PM
  45. Rated: 29
    8/2/2017 10:07 AM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    How do I get the new universal zoom Mark IV 8-24mm eye piece to focus at infinity on the Celestron Regal M2 100ED?

    Answer rated: 0
    This is described on page 5 and 7 of the manual (PDF: http://www.baader-planetarium.com/en/downloads/dl/file/id/356/product/3117/description_and_recommended_accessories_for_the_hyperion_universal_zoom_mark_iv.pdf ).
    You need to replace the telescope ring B with spotting scope ring A, this will give 4 mm more back focus. Then you have to push the eyepiece into the eyepiece clamp as far as possible; you may have to give it some mure pushes because the locking collar of the spotting scope moves when you turn it.
    Answer by: Baader Web Team (Admin) on Aug 2, 2017 10:26:00 AM
  46. Rated: 28
    1/21/2018 6:58 PM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    On my Newtonian: If I'm using a MPCC w/this zoom and alternating between visual and T2 w/Nikon APS-C, is there some sort of extension I could use (clicklock preferred), so that I don't have to add/remove the focuser ring extension each time? To make matters even more fun, this will be used on a Bresser Hexafoc... Is this doable?

    Answer rated: -69
    Unfortunately, I don't see a solution for this - the camera has to be adapted directly onto the T-2-thread of the MPCC, so this thread must remain accessible. Even if you attach a T-2-Clicklock to the MPCC, you'd have to unscrew the Clicklock to attach the camera.

    So, you can't get rid of the T-2-thread, there is no space for any quickchanger, once the camera is attached.

    The only solution I can think of at the moment for more comfort would be an additional MPCC which is attached permanently to the camera adapter...
    Answer by: Baader Web Team (Admin) on Jan 31, 2018 9:45:00 AM
  47. Rated: 28
    6/28/2020 11:11 PM Baader T-2 / 90° Astro Amici-Prism with BBHS ® coating
    Regarding the quality of visual observation, is there any difference between this T2 Roof prism (2456130) and the 2" Astro Amici Prism (2456120)?

    Answer rated: -9
    Both of our Astro-Amici Prisms are produced with the same specifications. There is no difference in the quality of visual observation - the only difference is the size.
    Answer by: Baader Web Team (Admin) on Jun 29, 2020 10:30:00 AM
  48. Rated: 28
    7/17/2021 10:00 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I've recently purchased a new ClickLock 2 inches clamp (part num. 2956254) to upgrade my new Skywatcher Quattro 8P's focuser.

    Much to my surprise, I found that the ClickLock is unable to lock the Skywatcher original coma corrector: even if the ClickLock is completely closed, the coma corrector still slips free in the focuser tube.

    The same issue appears with the SharpStar 1X coma corrector.

    Were you aware of this issue?

    Thiis problem could be easily solved if the ClickLock was able to reach a slighly smaller diameter at its maximum closing position.

    Is there anything I can do to solve this problem, other than return the ClickLock a use the original focuser adapter? I really love the ClickLock

    Answer rated: -4
    The Clicklock clamp is designed exactly to fit for the 2" standard and fits all eyepieces and accessories we and many customers tested. We can only conclude Its not a problem of the clamp, its a problem of accessories not manufactured accurately enough according to standards, sorry to say.
    Answer by: Baader Web Team (Admin) on Jul 19, 2021 10:51:00 AM
  49. Rated: 28
    5/6/2017 6:25 PM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    I want to connect my existing EOS T-ring to the Baader MPCC. Does the item on the webpage come with the necessary spacers, or will I have to buy additional items?

    Thanks.

    Answer rated: -14
    If you use any standard T-2-ring, you can use the MPCC without any other adapters - the ring will give you the necessary distance of 55mm to the sensor of your DSLR. This is the standard-distance which was also used bei camera lenses with T-2-thread.

    Only if you have a low-profile T-2-ring like #2408318 or if you use the M48-thread, you'll have to use additional spacer rings.
    Answer by: Baader Web Team (Admin) on May 8, 2017 9:41:00 AM
  50. Rated: 28
    3/25/2020 1:50 AM Baader FlipMirror II Star Diagonal
    I cannot get the image in the eyepiece to center. I'm using the Baader Focusing Eyepiece holder. I have moved the adjustable T2 ring to its limit, but the image when centered in the camera is at the edge of the field of the eyepiece. Ideas?

    Answer rated: 8
    You probably need to adjust the two brass pins on which the mirror rests in its lower position. This way, you can move the image along the optical axis of the telescope (either closer to the telescope or to the camera).

    To test this, take a look through the eyepiece and move the mirror slightly up - if the star moves in the desired direction (or contrary to it), then you need to adjust the brass pins. Please see page 11 in the manual (chapter 3 - Adjusting the mirror). If it moves sideways instead, things get complicated. But that's most probably the solution.
    Answer by: Baader Web Team (Admin) on Mar 25, 2020 10:58:00 AM
  51. Rated: 28
    12/12/2019 7:41 PM Alan Gee Telecompressor Mark II (T-2 part #20)
    I've very interested in this product but want to make certain I'm clear on what I would need to use it with my old model C9.25, ZWO ASI1600MM Pro (6.5mm back focus distance), ZWO EFW (20mm thick) and ZWO OAG (16.5mm thick).

    In addition to the Alan Gee & the provided 19mm spacer tubes, I would need:
    BTA T-adapter
    Baader Varilock 29 (at 20mm position)
    Baader Centering ring

    Is that correct?
    Thank you.

    Answer rated: 10
    Yes, you need
    - Centering ring for Alan Gee II Telecompressor # 2454410 to use the Alan Gee at the C925
    - Baader T Adapter (BTA) for SC and MAK Telescopes # 2408160
    - Baader VariLock 29, lockable T-2 ExtensionTube 20-29mm with spanner tool # 2956929 at ca. 20mm

    You can play around a liitle bit with the length of the VariLock to vary the magnification factor, if you want to.
    Answer by: Baader Web Team (Admin) on Dec 16, 2019 12:37:00 PM
  52. Rated: 28
    8/4/2020 1:33 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I have a Explorer Scientific ED127 with 2" focuser.I am looking for a Baader Click-Lock adapter. Which one should i order?

    Answer rated: -20
    You should need the 2" ClickLock M54i x 0,75 (Bresser / Omegon / Explore Scientific) #2956253
    https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/eyepiece-clamps/baader-2%22-clicklock-eyepiece-clamps.html#574=1224
    Answer by: Baader Web Team (Admin) on Aug 4, 2020 9:06:00 AM
  53. Rated: 28
    12/28/2016 9:00 PM Baader Double Polarizing Filter
    I am going to be shooting a full solar eclipse this summer. My thoughts are to use a 400mm Canon lens with a 2x converter. The barrel thread is 77mm what do you recommend?

    Answer rated: 22
    We would need the outer diameter of your lens to answer correctly. You will probably need an ASBF 70 or 80 filter.
    Please check out our Baader Solar Filter Finder tool to make sure by yourself:
    http://astrosolar.com/baader-solar-filter/
    Answer by: Baader Web Team (Admin) on Jan 9, 2017 8:26:00 AM
  54. Rated: 28
    1/17/2022 5:20 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I just received the #2956268 M68a x 1-ClickLock (Zeiss-norm / Baader M68-System) for my TS ED Apo 102 /714.
    I have to screw The Baader ClicLock in the telescope, but i have no locking screws to secure the ClicLock to the telescope.
    On my Skywatcher Mak 150 i also have a Baader ClicLock, and that one does have locking screws to secure the ClicLock to the telescope.
    So why i can"t the ClicLock to my Apo?

    Answer rated: 11
    Usually, all our ClickLocks - with the exception of those with a ring-dovetail, maybe you have one of those on your Mak? - are only screwed onto the telescope, without an additional locking screw. Some of them have screws to adjust the orientation of the handle, but that's only for conveniance. If you tighten the ClickLock on the thread of the telescope, it's usually strong enough to hold its place even if you aren't too gentle when locking/unlocking the eyepiece.
    Answer by: Baader Web Team (Admin) on Jan 19, 2022 4:34:00 PM
  55. Rated: 27
    2/12/2018 12:22 AM Baader DSLR-2" Filter Holder M48/SP54
    Could you tell me the exact products I need to fit a 2” filter to a DSLR lens of 58mm diameter please?

    Answer rated: 1
    You need the following two parts:

    # 2408166 - Baader DSLR-2" Filter Holder M48/SP54
    # 2958058 - Baader Hyperion DT-Ring SP54/M58

    Then you can mount your 2"-filter onto the M58-filter-thread of your lens.
    Answer by: Baader Web Team (Admin) on Feb 12, 2018 8:20:00 AM
  56. Rated: 27
    3/29/2021 4:03 PM Universal Alan Gee II - Telecompressor (UAG II)
    I would be interested in using the UAG II with my conventional C9.25 for monocular observations. I would use it as suggested, i.e., replacing a 2" mirror diagonal's nosepiece with the UAG II, and inserting it into a 2" Clicklock visual back. In this way, the 1.25" eyepiece would be at the nominal distance of ~121 +/- 1 mm from the reducer.
    However, some users claim that the UAG II causes aperture loss in this configuration, i.e., the light cone hitting the secondary would be too wide and thus cropped, due to the primary being pushed forward too much in order for the telescope to reach focus with the reducer.
    My question is: is this true, and if yes, what would be the amount of the aperture loss? Also, do the UAG II and the original Alan Gee Mark II differ in this respect (the latter being inserted further up into the baffle tube)?

    Answer rated: -4
    The new UAG II is entirely a visual product, only intended for use with the Maxbright II binocular viewer. It is not intended to be used on its own for monocular observation, but for easy, comfotable use with the binoviewer

    It is likewise NOT intended to work in front of a 2" star diagonal but only directly in front of the binocular viewer.

    Absolutely any telecompressor causes "aperture loss". But not because it would crop the incoming beam, but because it does what the name says - it "compresses" the beam to become smaller in diameter. So, you get a smaller, brighter image.

    At the distance of 121 mm the fully illuminatred field circle would be 18 mm and this is mercilessly visible in a CMOS-camera. The light fall off is so slow though that the human eye hardly notices the vignetting until the image circle has reached a diameter of ~23 mm. This is the reason why it is a joy to use with the binocular viewer and 1.25" eyepieces (which have field stop diameters of less that 26mm, and many binoviewers have even smaller prisms), but NOT with 2" eyepieces. Many eyepieces btw. work with this "vignetting trick"to -virtually- sharpen the outermost edge of the field. Check the web for TV-Plossel eyepieces of the first generations which used this "design feature" already 30 years ago.

    Vignetting of UAG II and AG II are the same. The AG II was designed around the same time as the TV-Plossels. This was the time of emulsion films hundreds of times less sensitive than modern CMOS-cameras, and when 2" eyepieces did cost a fortune. Please do not try to pursue your project using the AG-lens principle for applications it was not intended for.

    For a larger monocular true field of view, we'd recommend a 2" eyepiece like the Hyperion 36mm (the field stop diameter and thus the true field of view is comparable to thos of 2" eyepieces with even longer focal lengths, but the apparent field of view is much larger). If you aim for a brighter image with 1.25" eyepieces, then the UAG (in the standard version, which offers more options for configuration) is the better choice.
    Answer by: Baader Web Team (Admin) on Mar 30, 2021 1:36:00 PM
  57. Rated: 27
    5/28/2018 5:36 PM Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp
    PRISM-2Z 2456117 (2 inch diagonal with zeiss prism) I have a Celestron Evolution 9.25, with 2" visual back. Can I remove the nose piece and screw this diagonal directly onto my 2" visual back and use the lock ring LRING 2458270? Thank you. Jeff

    Answer rated: 31
    Yes this is right when you unscrew the 2" nosepiece a 2" SC thread is released. With the help of the locking ring you´re able to mount
    the diagonal onto the OTA: https://www.baader-planetarium.com/en/baader-2%22-nexstar-locking-ring..html
    Answer by: Baader Web Team (Admin) on May 29, 2018 9:48:00 AM
  58. Rated: 27
    9/23/2019 4:28 PM Baader Tripod Adapter Flange for NexStar SE / EVO
    What size bolt does it take is it M10 or M12

    Answer rated: -4
    The center hole is a standart metric M10 thread, the three (3x120°) outers are 5/16 Inch and pitch is 18.
    Answer by: Baader Web Team (Admin) on Sep 24, 2019 9:37:00 AM
  59. Rated: 27
    12/31/2019 2:48 AM Baader Wide-T-Ring Fujifilm X with D52i to T-2 and S52
    In the answer posted above, customers are advised that the Baader Wide-T-Ring Fujifilm X cannot be successfully used with a RASA 8 and a Fujifilm XT camera. However, on September 10, 2019, Team Celestron posted a successful report from SEBASTIAN VOLTMER directly into the Baader blog indicating that the Baader Fujifilm adapter is well suited for use with the RASA 8. Baader Planetarium staff even commented on that blog post. Can we now assume the Baader Fujifilm adapter can be used with the RASA 8? If so, please advise if the universal filter changer can also be used. If it can, please specify exactly which parts are needed to use with Baader f / 2 high-speed filters. Thanks in advance for your assistance.

    Answer rated: 23
    Our Wide T Ring puts the Fuji XT3 26mm away from the sensor, while Celestron has designed the RASA for a distance of 25mm. So, the ring is 1mm too far away and does not work - officially. But as the image of Mr. Voltmer shows (https://www.celestron.de/ce_de/rasa-8-erfahrungsbericht-mit-fujifilm-x-t3-sebastian-voltmer/), it is still inside (or close enough to) the tolerances, so that the Wide T-Ring can actually be used and produce very nice images.

    But unfortunately, there is not enough space to use an additional filter drawer. We are working on a very flat filter holder and tilter for the RASA 8, the Baader FCCT (Filter Changer and Camera Tilter), but it will only work with astronomical cameras which need less backfocus than a DSLR/mirrorless camera. But please remember that there is not much use in using narrowband filters with a colour camera, as then only one fourth of the pixels is used (usually those sensitive for red, while those for green and blue get no signal). For monochrome astronomical cameras, the FCCT will be an interesting solution. We hope that it will be available in spring 2020.
    Answer by: Baader Web Team (Admin) on Jan 8, 2020 3:04:00 PM
  60. Rated: 26
    12/24/2020 6:37 AM Bundle: Hyperion Universal Zoom Mark IV with Hyperion-Barlow 2.25x (8-24mm / 3.6-10.7mm)
    Is there a lunar filter that you recommend for use with this model, both with and without the Barlow attached? I'm assuming 1.25" but I've not been able to confirm elsewhere. Thanks!

    Answer rated: 4
    A 1.25" filter is fine and can be used with both the Barlow and only the Zoom eyepiece.
    If you use a 2" star diagonal, you can also use a 2" filter and mount it into the star diagonal or - if you use one - the reducer to 1.25".
    Answer by: Baader Web Team (Admin) on Dec 29, 2020 12:39:00 PM
  61. Rated: 26
    9/19/2016 3:39 PM 2" Glasspathcorrector® 1,8x for Refractors and SC's
    My 1.8x glass path corrector appears out of collimation on f/5 while the 1.7x works perfectly.
    I have the following: Baader 2" glass path corrector for refractors, SC and other systems. Extension factor 1.8x.

    I have tested it with various diagonals and in 3 high quality refractors with my Mark V Binoviewer.

    Everything looks good in my 180mm F7 and 101mm Petzval F5.4 refractors. But in my 140mm Petzval F5 refractor the stars appear out of collimation on regular stars as well as on an artificial star tested indoors. When I replace the 1.8X GPC with the smaller 1.7X GPC or 2.6X GPC everything looks good. The scope has perfect collimation. However, when I use the 1.8X GPC something is out. It doesn't really make sense so I am wondering if you know what might be the problem. Perhaps F5 is too fast for the 1.8X GPC. Is that correct or could it be something else I am overlooking?

    Answer rated: -39
    your assumption is correct. We manufacture two glasspath correctors with ~2" front aperture that are carefully designed to pick up the full beam to enter into the binocular.

    The 1.7x version (2" GPC only) is designed to correct the coma of Newtonian telescopes and work down to f/3.5.
    The 1.8x model is designed to work perfectly with refractor telescopes from f/8 to f/6. The design dates back to the days of Carl Zeiss APQ-Apochromates and was done by the APQ-designer, Dr. Pudenz.

    We are sorry that the 1.8x (Refractor-)GPC does not perform to your expectation at f/5, but this is the fate of every specialised design, made to perform 100 % at the target application.

    Answer by: Baader Web Team (Admin) on Sep 19, 2016 3:40:00 PM
  62. Rated: 26
    1/12/2021 4:21 PM Baader MaxBright® II Binoviewer with case
    I am considering buying the Maxbright ll (mainly because of the clicklock) and was wondering how much difference optically I will see in comparison with original Maxbright that I own. I use them on a Celestron 8SE with TV 2" everbrite dielectric diagonal. Thanks!

    Answer rated: 11
    The main difference which you will notice will be at low magnifications: You can use eyepieces wih 32mm without notable vignetting by the larger prisms. In this regard, it is much closer to our Mark V giant binoviewer than to the smaller binoviewers. Especially with the Universal Alan Gee II - Telecompressor (UAG II) # 2454405, you can get larger field of views han with the old MaxBright or similar binoviewers.

    At high magnifications with a smaller field of view, there isn't too much of a difference, except perhaps a little bit in direct comparison because of the coating.
    Answer by: Baader Web Team (Admin) on Jan 14, 2021 9:28:00 AM
  63. Rated: 26
    11/27/2021 1:13 AM Baader M68-Tilter
    Can you please make this in m54 format as well for the Epsilon and QHY camera system? There isn't sufficient space to use a conversion adapter. But if this were 9.5mm optical length in m54 format it would be perfect.

    Answer rated: 17
    We would like to offer also an M54 Tilter in the future. However this will still take time, and unfortunately we cannot give an estimate yet when it will become available.
    Answer by: Baader Web Team (Admin) on Nov 29, 2021 8:26:00 AM
  64. Rated: 26
    3/24/2022 2:08 PM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    Please, will this Crayford fit Sky-Watcher Skymax 150 Maksutov?

    Answer rated: 19
    A Sky-Watcher Maksutow 150 is build with a 2" thread so you can directly screw on the Steeltrack SC. Just check before because the
    diameter of the focuser is 95mm that you not collide with the original focus knob.
    Answer by: Baader Web Team (Admin) on Mar 28, 2022 4:43:00 PM
  65. Rated: 26
    4/20/2020 1:59 PM Baader MaxBright® II Binoviewer with case
    I would like to know what is the light transmission of both side of the binoviewer? Do you know how does it compares to Televue or Deinkmeier binoviewer regarding light transmissions?

    Answer rated: 24
    The Maxbright II definitely is on par in transmission with TV- or Denk-binos. We have applied the same optical coatings and beam splitter technology as on the Mark V. We do not endeavor to run into a number competition concerning transmission values and we do NOT try to supersede the exaggerations we see in the Denk-specs. TV is remarkable conservative and we do not claim to be better.

    However - we have worked more than four years on making this product irresistible and we did put all experience from 35 years of making binocular viewers into this latest bino of ours. This is NOT just some astro-modded operation-microscope-bino from Taiwan or China. Our product is the smaller version of the Mark V, were we had bought the design and production drawings from Carl Zeiss Jena 25 years ago.

    We do tender components for our products worldwide and we do the assembly and QI here in house. If you were to read through the manual for this product (see "Downloads" tab) it ought to become obvious that no one else has given it more care to make this as universal in usability as ever possible. The development costs were too huge to fail. We dearly hope people will see this - at the spot - when using this product the first time.
    Answer by: Baader Web Team (Admin) on Apr 20, 2020 2:01:00 PM
  66. Rated: 26
    9/29/2022 7:31 PM BCF 1 - DSLR Astro Conversion Filter for Canon APS-C Cameras (all latest Models)
    Does this work with Canon EOS 2000D?
    Can I find the right filter frame on this website?

    Answer rated: 7
    "All latest models" also includes the 2000
    Answer by: Baader Web Team (Admin) on Sep 30, 2022 9:46:00 AM
  67. Rated: 26
    7/16/2018 9:52 AM Hyperion Zoom 2.25x Barlow lens
    Can you tell me the full length of this Barlow with the 1.25 fitting?
    I need to source a Barlow that is short so I can achieve in-focus with a DSLR. thanks.

    Answer rated: -16
    The distance between your camera's T-ring and your focuser with inserterd Barlow is ca. 14mm, the nosepiece is ca. 2 cm long.
    Answer by: Baader Web Team (Admin) on Jul 16, 2018 10:15:00 AM
  68. Rated: 26
    1/20/2022 7:42 AM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    How waterproof or weatherproof is this zoom eyepiece please?

    Answer rated: -26
    Making a zoom become waterprove has severe consequences. The designer must decide if he can accept a hard rotation action or not. For use with a spotting scope it "could" have been be made waterproof by fitting O-rings into the rotating mechanics to seal the moving area. However - this does work on a short and relatively lightweight spotter - but the rotation movement of the zoom-action in this case is getting stiff and hard to rotate.

    For an astronomical telescope this would be an impossible behaviour because the telescope would wiggle when the zoom-action is so hard to turn - especially in winter.... Also the "Click-function" would become impossible to feel - the whole eyepiece would become "just another zoom".

    So - in order to enable an effortless zoom action with the click-stops to be just sightly noticeable (if these are "hard-clicks" likewise astronomers do complain!), we omitted a tight seal in the area relevant for the zoom action. However - as soon as the eyepiece is connected onto a telescope (or spotter), the upper lens parts certainly are O-ring sealed and the eyepiece can justifiedly be called water resistant, because rain will not enter.

    At any rate - if you are in need of a completely watertight solution for harsh outdoor use on a spotting scope, this eyepiece may not be a solution for you.


    Answer by: Baader Web Team (Admin) on Jan 20, 2022 8:23:00 AM
  69. Rated: 25
    6/25/2022 12:13 AM Baader Neodymium (Moon & Skyglow) Filter
    What is the correct Baader UFC filter slider to fit the 2" version of this filter? Will it fit into the 2" UFC slider (product #2459112)?

    Answer rated: -14
    Yes, the 2" UFC Filter Slider (#2459112) will fit the 2" version of the Neodymium Moon & Skyglow filter, as long as this is a newly purchased filter in 6mm Low Profile Filter Cell. There are still some old used versions on the market with larger filter cells (8mm height), which won't fit.
    Answer by: Baader Web Team (Admin) on Jun 27, 2022 8:02:00 AM
  70. Rated: 25
    9/9/2016 6:44 PM The Original: Baader Planetarium
    Have an older unit, are they still available for purchase and can I purchase a part for mine if needed (Transformer and Glass Sun.

    Answer rated: -14
    The Baader Planetarium is still in production. Orders can be placed. Delivery times might be long depending of production shedule. We try to keep all spareparts on stock. If not we do have new parts wich can be installed or used instead of the original parts with slite modifications done by our workshop. If you have a need, please send a e-mail.
    Answer by: Baader Web Team (Admin) on Sep 13, 2016 5:41:00 PM
  71. Rated: 25
    1/28/2020 11:25 AM Alan Gee Telecompressor Mark II (T-2 part #20)
    Is it possible to use the telecompressor with a C11 ?
    In that that case is there any adaptator to be used ?
    What if a crayford is used ?

    Answer rated: -1
    As both C14 and C11 also offer the standard 2" SC-thread, the Alan Gee can be used with these telescopes, too (as long as you don't remove the 2" SC thread and only use the larger 3" thread).

    But we are working on a version of the Alan Gee for 2" eyepiece holders like our 2" Clicklock or a regular focuser. We think that it will be available in no lather than early spring (just follow our Newsletter at https://www.baader-planetarium.com/de/newsletter/), it will be more intuitive to use than the regular Alan Gee. This should be the better solution for you as you can easily use it with your 2" focuser.
    Answer by: Baader Web Team (Admin) on Jan 29, 2020 8:53:00 AM
  72. Rated: 25
    3/20/2021 7:54 AM Baader UFC (Universal Filter Changer)
    Will this work in a Skywatcher ED80 ?
    I need to put it between the flattener and the scope.
    the telescope has M56 male threads in the focuser tube.
    The flattener is M48 male in the camera side and M56 female at telescope side. Thanks in advance!

    Answer rated: 13
    It would be no problem with the M48-thread.

    Unfortunately, we do not have M56-adapters yet. You'd need someone who can make an adapter from M56 to one of our threads.
    Answer by: Baader Web Team (Admin) on Mar 23, 2021 12:57:00 PM
  73. Rated: 25
    3/12/2017 8:05 PM 2" Research Grade TZ-3 Telecentric System (3x focal length)
    A couple of followup questions. 1) I noticed the TZ-3 tube has 3 'sections' longest being in front, shortest at rear holding 'collimation'/'pickup' lens and a middle section that appears to be just a spacer. Can the middle section be removed (omitted) such that rear lens becomes closer to front 'input' lens.
    2) Is the middle section intend for removal to provide for an alternate closer location of pickup lens or is this just a manufacturing convenience to be a separate part (reuse of existing parts?)?
    3) What would be the characteristics of the resulting output beam? Diameter, F#, impact on position of TZ relative to main objective (assume that would not change), impact on distance from TZ to final focal plane which was originally 250mm?

    Answer rated: -10
    This definitely is not the case. Neither the TZ-3 nor any other TZ-system can retain its designed optical performance, when the distance between the internal lens groups is being altered.

    Answers for individual questions:
    1) The middle intersection roughly marks the position of the initial instrument focal length. The middle section cannot be removed.
    2) The middle intersection bears a mask (straylight shield). No part of this product is being "reused" on any other product.
    3) A large deviation from the designed 250 mm focal lenght is not advisable. Noticeable deterioration of the image contrast would be inevitable.
    Answer by: Tobias Baader (Admin) on Mar 13, 2017 12:14:00 PM
  74. Rated: 25
    9/23/2020 9:32 AM Baader MaxBright® II Binoviewer with case
    I am considering a purchase of binoviewer to use with my 305/1500 collapsible SkyWatcher dob. I would like to use ADC for planetary viewing, hence I need at minimum a 2x barlow/f.extender. my question is: could the 2.6 GPC be placed before ADC, i.e. can additional 55mm of lightpath be introduced between the GPC and binoviewer (OTA -> 2.6 GPC -> ADC -> bino)? Focusing distance is not much of an issue, since mirror can easily be moved. I am more interested in understanding how GPC will behave - is it sort of telecentric or 2.6x effect with distance becomes 3x or more.

    Answer rated: 5
    The glasspath corrector behaves more like a barlow lens than like a telecentric - it's best if you think of it as a barlow lens which also corrects the colour aberations of the prisms.
    Answer by: Baader Web Team (Admin) on Sep 23, 2020 12:15:00 PM
  75. Rated: 25
    2/1/2019 1:59 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Can you tell me which 2" clamp is appropriate for the Sky-Watcher 8" Flextube SynScan GoTo Collapsible Dobsonian?
    Does this clamp center the accessory relative to the focuser tube?

    Answer rated: 26
    Most likely (we don´t sell SkyWatcher) your clamp is made with a M54x1 thread so our 2956254 will fit. Please unscrew you clamp and check it
    with a caliper or ruler to be sure.
    Answer by: Baader Web Team (Admin) on Feb 4, 2019 9:42:00 AM
  76. Rated: 25
    6/29/2020 5:45 PM Baader FlipMirror II Star Diagonal
    Can the Flip Mirror 2 be used with the Celestron Edge HD 11 and what adaptor is needed to attach it to the telescope back?
    Thank you

    Answer rated: 11
    Yes it can. You only need our SC / HD Ultra-Short T-Adapter #2958500B, as described on page 5 of our FlipMirror II Instruction manual: https://www.baader-planetarium.com/en/downloads/dl/file/id/1568/product/4285/instruction_manual_baader_flipmirror_ii_star_diagonal.pdf
    Answer by: Baader Web Team (Admin) on Jun 30, 2020 3:30:00 PM
    Answer rated: -1
    I already purchased the flip mirror to be used with the Celestron 14 HD with celestron adapter 2958500B . can I use the a clicklock 2956233 ?
    I have 4 Zwo cameras , 2 color 094 full frame & 2600 & 2 mono 1600 & 174 & Baader Filters size 2 LRGB & set of Ultranarrow Filters ( 3,5nm & 4 ) Which Varible extension rings are recommended , Camera side ?
    on the upper side ( I have Eyepieces set 82 degree 1.25 /2 & 100 degree set too =Explore Scientific . your recommedation for connection please ?
    I bought also from you Baader Off axis guider 2956951 , Can i attach a star Xpress Lodastar X2 Autoguider ?
    I have a Starlight Feather touch Microfocuser for C14 & a Micro Touch Wireless Focusing System . do i need your Steel tracker 2957220 ? Vielen Dank , Ich bin ein Anfanger in Astronomy .
    Answer by: Kamal Alzayer on Oct 17, 2021 11:10:02 AM
  77. Rated: 25
    11/22/2022 5:11 AM Baader 5mm Hyperion 68° Modular Eyepiece
    I have a APM-SD120-90 degree Binocular with the standard bundle APM18mm eyepiece. It will only take 1.25 inch ep.

    I am interested to add more eyepieces to complete the range and magnifications.

    Will the whole series of Hyperion episodes work with my bino?

    Will the Hyperion zoom work also?

    Will the Morpheous series also work?

    Answer rated: -12
    We are delighted that you consider our eyepieces for this APM Bino. Since we don't sell APM products however, we have no further information about this product than what is published on their website. So far we don't see information about backfocus, distance between the eyepiece clamps nor the maximum insert depth of 1.25" barrels.

    So these questions ought to be answered (and possibly tested) by the producer. It is solely a matter how much backfocus the designer of the binocular has built into his system and we truly do not know about this.
    Answer by: Baader Web Team (Admin) on Nov 24, 2022 12:24:00 PM
  78. Rated: 25
    7/19/2019 2:47 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I have a Celestron Edge HD 8 and I am looking to upgrade the visual back to ClickLock to make it easier and more secure when attaching my camera and when swapping between viewing and imaging. I will be using a Sony Nex 6. I have a camera specific T2 adapter already but I am unsure what other adapters I need to get to the magic number of 133mm. I will not be using the 0.7 reducer. Many thanks!

    Answer rated: 1
    The length of the 2"SC thread is 9,9mm and for that the optical legth of the matching ClickLock gets reduced from 47mm to 37,1mm. From the
    outer end of the ClickLock #2956220 to the focal plane the distance is now 96,25 referring back focus 133,35 minus 37,1

    The camera itself has 18mm backfocus (Sony e=eighteen bayonet) plus11mm for the bajonett/T2 Ring is reducing 96,25mm-(18mm+11mm)
    so we have 67,25mm to brigde with following Items:
    https://www.baader-planetarium.com/en/baader-2%22--t-2-nose-piece-and-camera-adapter-(same-as-used-by-sbig)-(t-2-part-16).html
    https://www.baader-planetarium.com/en/baader-m68-extension-tube-40mm.html
    https://www.baader-planetarium.com/en/baader-t-2--15-mm-extension-tube-(t-2-part-25a).html
    https://www.baader-planetarium.com/en/baader-t-2--7.5-mm-extension-tube-(t-2-part-25c).html

    Left is now 2,25mm to take 1mm+1mm+0,3mm from this adjustment rings:
    https://www.baader-planetarium.com/en/t-2-fine-adjustment-rings-(03--05--1-mm)---aluminium.html
    Please check if your bayonet is 11mm - for example, this ring is only 8,3mm:
    https://www.baader-planetarium.com/en/baader-t-ring-sony-enex-bayonet-with-d52m48-to-t-2.html
    Answer by: Baader Web Team (Admin) on Jul 22, 2019 7:58:00 AM
  79. Rated: 25
    11/10/2016 5:02 PM Mark V Großfeld (Giant)-Binocular
    What is the in focus requirement of the binoviewer

    Answer rated: 41
    The optical length of the Baader Giant Binoviewer Mark V is 113mm. We suggest to use a 1.25x glass path corrector in order to get the color correction right. This will also enlarge the backfocus of your telescope and will be enough magnification for most applications.
    Answer by: Baader Web Team (Admin) on Nov 11, 2016 9:26:00 AM
  80. Rated: 25
    11/2/2020 9:49 PM Baader 2" ClickLock Diagonal Mirror
    I have a Baader 2" click lock diagonal (#2956100) directly mounted to a SCT with a Baader 2" Nexstar locking ring. I just received a Baader 2" filter, but can find no way to insert this into the optical path, before or after the mirror. Is there an adapter available for this. Ideally, I would like to leave the filter in places instead of moving it from one eyepiece to another.

    Answer rated: 2
    You can insert the Baader 2"/2" Inverter Ring with 48mm filter thread # 1508020 into the thread on the inside of the eyepiece side of the star diagonal as shown in this picture: https://assets.baader-planetarium.com/media/extendware/ewimageopt/media/inline/d1/9/baader-2-clicklock-diagonal-mirror-12b.jpg. This should also work when the Clicklock is attached to the star diagonal - please take a look inside the Clicklock to see if the thread is fully acessible, so that you can screw the ring into it.

    The ring has got a filter thread and is 12mm long, so either our 6 LPFC or 8mm filters will work.

    The other options would be inserting the filter into the 2"/1.25" reducer for your 1.25" eyepieces, or using either #2956237 37mm ClickLock extension or #2956247 47mm ClickLock extension
    Answer by: Baader Web Team (Admin) on Nov 3, 2020 9:58:00 AM
  81. Rated: 25
    9/2/2019 11:46 AM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    With eyepiece projection, the image at the edge is extremely blurred. What could be the reason for this?

    Answer rated: 26
    For eyepiece projection with our Morpheus and Hyperion (zoom) eyepieces, we recommend a distance between eyepiece and T-ring of 40 mm on full-frame cameras, in addition to the 55 mm that were the flange focal distance of all "SLR" and DSLR camera bodies for decades when a T-ring was placed in front. Only with a T-ring that maintains this distance can old lenses with a T-thread deliver sharp images. Therefore, it has been tried to take this distance into account in all designs, because this is the only way to ensure that the sharpness performance is optimal. Of course, all this is only valid to a limited extent today - because the DSLR standard is losing it importance and the term „T-ring“ is all too often reduced to the mechanical thread and not the correct distances. In our brochure on digiscopy, we have therefore stated the back focal distance of 55mm. With a DSLR (full frame or APS-C), this distance is also maintained in good approximation with modern, narrow T-rings, which are intended for use on telescopes, where every millimetre often has to be haggled. For Micro Fourthirds cameras, for example, we have a special adapter that allows both an adaptation with the 55mm standard support dimension and a much shorter adaptation.

    Mirrorless system cameras have a much shorter back focal distance than comparatively large SLR cameras. The available T-adapters are usually for use with telescopes with a moving focuser. Here the shorter back focal distance must be compensated by additional extension sleeves, if a certain distance has to be kept.

    The example adaptations in our digiscoping brochure thus apply to all T-adapters that follow the T2 standard and deliver a back focal distance of 55mm.
    The indicated distances of
    min. 40mm spacer sleeve plus 55mm T-2 flange focal distance for full format
    min. 30mm spacer sleeve plus 55mm T-2 flange focal distance for APS-C
    min. 15mm spacer sleeve plus 55mm T-2 flange focal distance for MFT
    were empirically determined (Canon full format, Nikon APS-C (slightly larger sensor than Canon APS-C), Panasonic MFT) and are the values at which the image looked good, i.e. no (disturbing) distortion could be detected in nature photography. However, only the Hyperion Zoom without Barlow lens was used. For decades, we had in principle recommended the 40mm extension; with the smaller sensors, shorter distances (and less magnification) are also possible. The overall length of an adapter ring from the M43 eyepiece thread to T-2 was neglected, or it was regarded as part of the eyepiece.

    With shorter overall distances than indicated above, the sharpness in the edges is catastrophic. Only with these distances the image is enlarged in such a way that the entire sensor can be used.

    When working with an additional Barlow lens for even more magnification, the resulting effective focal length increases extremely and the system becomes more difficult to control. The thick stack of lenses does not make the image any better, and the telescope opening must provide sufficient resolution, also in relation to the pixel size of the camera. For highest magnifications we therefore recommend the FFC instead of the eyepiece projection in combination with a barlow lens – more on this below.

    What can easily be overlooked is that, depending on the camera type and the telescope aperture ratio, a more or less pronounced vignetting is unavoidable.

    We regret that we can’t give a binding (or universal) recommendation for an eyepiece-Barlow-lens-combination - for no single eyepiece on the market - where vignetting does not occur. Eyepiece projection is basically a compromise and has been "invented" for planetary photography since the beginning of all photography in order to be able to image a small object in the center of the image with excellent sharpness and very long focal length. The further development of the eyepiece also made it possible to enlarge the usable image area - however, this method is still a compromise. We therefore do not claim that you can achieve perfect sharpness over the entire image field with an eyepiece and a Barlow lens. We also do not claim that you can achieve a completely unvignetted image field!

    For exactly this reason - because there has been no solution from anyone in the world (and still is not) - we asked Carl Zeiss-Jena in 1990 to calculate for us a plano barlow lens of any complexity for medium format cameras. Ultimately, this was only possible with two additional crystal substrates made of genuine calcium fluorite (not comparable to simple ED glass). For the Baader Fluorite Flatfield Converter (FFC) Barlow - which can produce an image circle of 90 mm from 4x to 8x - an aperture ratio of 1:10 - as is the case with many refractors - was the basis for calculation at that time. The 90 mm image circle was due to the fact that the famous "PENTAX 6x7" medium format camera was available at the time - with a 90 mm image diagonal.

    To this day, this FFC converter lens system is "the sharpest of all Barlow lenses" in the world. And since the full 42mm format uses less than half of the FFC’s 90mm image circle, the FFC works so well even at an aperture ratio of f/5 that it delivers diffraction-limited sharpness even with CMOS chips with ~ 4my pixel size (if the telescope optics and seeing are good enough). However, this only works so well due to the large image distance. If you are looking at the "Baader FFC-Barlow", you will see that the image distance has to be varied between 80 and 150 mm (or even more). So you pay for the excellent optical performance with a very long mechanical construction. Without an excellently stable focuser, this can only cause frustration. Anyhow - You will surely find enough judgments which testify that there is no other projection lens system with sharper - and not vignetting - imaging.

    So if photography with very long focal lengths is your main focus, then you would have to replace the combination of the eyepiece with a 2.25x Barlow for a FFC - in addition to the armada of extension rings, which are necessary if you want to use this projection method without mechanical distortion.
    Answer by: Baader Web Team (Admin) on Sep 2, 2019 11:47:00 AM
  82. Rated: 25
    11/20/2018 7:05 PM Baader UFC (Universal Filter Changer)
    Will the filter base and slides be compatible with the new Celestron 8" RASA?

    Answer rated: -9
    We do not yet have an RASA 8 in our hands to adapt our UFC system to these. It will for sure take time until spring 2019 before we can come up with solutions..Please register for our newsletter to become informations about new products, adaptors a.s.o. as soon as they are available
    Answer by: Baader Web Team (Admin) on Nov 22, 2018 10:22:00 AM
  83. Rated: 25
    5/11/2020 2:36 PM Baader Takahashi Mewlon Aux-Adapter M71/M72 to fit #2558230
    I need an M72 inverter. I have an M72 female thread that needs to be an M72 male thread to mount my accessory. Can you help. I only see M72 to M68 which doesn't help me.

    Answer rated: -5
    I'm sorry, but we don't have such an adapter.
    Answer by: Baader Web Team (Admin) on May 12, 2020 10:27:00 PM
  84. Rated: 25
    9/11/2019 4:45 AM Baader 10mm Hyperion 68° Modular Eyepiece
    I have a ZWO ASI290MC planetary camera that I would like to attach to my Baader Hyperion 1.25"-2" on a Celestron Nexstar 6SE. What spacing adapter (M43) would I need to attach the ASI290 to the Hyperion 10 mm in order to achieve focus? Would I achieve greater magnification for planetary imaging if I were to attach the ASI290 camera to the Hyperion 10 mm eyepiece instead of using a 2X Barlow?

    Answer rated: -1
    Please take a look at our Digiscoping-PDF at https://www.baader-planetarium.com/en/downloads/dl/file/id/444/product/1210/digiscoping_camera_adaptations_for_afocal_photography_and_eyepiece_projection.pdf where we describe several options to attach a camera or video module.

    You need some distance between camera and eyepiece to avoid distortions at the edges; but with a smaller sensor, you can get closer. You'll usually achieve higher magnifications than with a Barlow lens; the formulas for calculating the effective focal lengths are inside of the PDF.

    For large sensor and really high magnifications, we recommend the FFC # 2458200
    Answer by: Baader Web Team (Admin) on Sep 11, 2019 8:48:00 AM
  85. Rated: 25
    12/17/2017 9:51 AM Baader Multi-Purpose Vario Finder 10x60 (single or with MQR-IV finder holder)
    What size threads are the two screws that attach the EQDovetail adapter to the finder?

    Answer rated: -11
    It is M5 thread - we´re using screws length over all 13mm with 3mm for cylinder head.
    Answer by: Baader Web Team (Admin) on Dec 19, 2017 8:36:00 AM
  86. Rated: 25
    12/30/2018 11:30 PM Baader Neodymium (Moon & Skyglow) Filter
    I have a unmodified Canon 60D for astrophotography. I image from a light polluted backyard and was looking for a light pollution filter to use. Would you recommend this or another filter for that purpose? I will be upgrading to a cooled mono CMOS camera in the near future and want the capability of a 2inch filter for both the CMOS and DSLR.

    Answer rated: 24
    The filter is suited for both cameras.
    Answer by: Baader Web Team (Admin) on Jan 29, 2019 10:39:00 AM
  87. Rated: 24
    6/23/2021 10:36 PM Glasspathcorrector 1:1,25 for Baader-Binoviewer with T-2 thread (MaxBright® II and MaxBright®)
    I would like to know the magnification at backfocus distances for the 1.25x, 1.7x and 2.6x GPCs. Even better would be graphs of each showing magnification for each at various backfocus distances or a formula for each GPC.

    Answer rated: 39
    The magnification is depending on the focal lenght of your telescope and the eyepieces that you are using.
    If you have a telescope with 1000mm focal length and use a 20mm eyepiece, the magnification is 1000:20 = 50x
    When using an Glaspath corrector 1,25 the magnification is 1,25x 50 = 62,5x
    Answer by: Baader Web Team (Admin) on Jun 24, 2021 8:25:00 AM
  88. Rated: 24
    1/23/2019 3:31 PM Baader 2" ClickLock Diagonal Mirror
    The Hyperion 17 baader eyepiece has the stop of the 2-inch barrel placed at 51,5mm. This eyepiece can be inserted into the 2-inch opening of the diagonal baader clicklock, without touching the diagonal mirror? Thanks for everything!

    Answer rated: 6
    Even with a screwed on 1,25" Filter the eye piece does not touch the mirror surface of the diagonal. If you´re still not sure you can take the
    diagonal and the eye piece separately in hand and see the eye piece over the mirror coming close when putting it in.
    Answer by: Baader Web Team (Admin) on Jan 24, 2019 9:20:00 AM
  89. Rated: 24
    10/8/2016 2:40 PM Maxbright Binocular incl. case
    I would like to ask if the release date of the successor model is already known? Thank you in advance.

    Answer rated: -119
    Please excuse, the release date of the Maxbright G2 is not confirmed and we do not want to have people waiting too long. Maybe you could find a used model somewhere to ease the wait. At any rate, we are working hard to make it very good - seriously better than the G1 Maxbright.
    Answer by: Baader Web Team (Admin) on Oct 10, 2016 10:13:00 AM
  90. Rated: 24
    9/15/2017 2:30 PM Baader 31mm Hyperion Aspheric 2" Eyepiece
    Is the 72° available with the 31,75mm plug-in sleeve?

    Answer rated: -4
    No, there is indeed an error in the technical specs data sheet, we will correct this ASAP. The apparent field of view when using the 1.25" barrel is 55°
    Answer by: Baader Web Team (Admin) on Sep 15, 2017 3:21:00 PM
  91. Rated: 24
    7/8/2020 4:50 PM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    I bought the MPCC to use with a Skywatcher Explorer 150d newton. Using an asi294mc, the only way I will get focus at infinity is to screw the corrector directly in the 11mm m42-m42 ring that comes with the asi. Adding spacers to reach 55mm doesn’t work. I am thus far from that 55mm that is supposedly required to reach focus. Any idea about what is happening here??

    Answer rated: 1
    Do you have any extensions in use which are required to reach focus with an eyepiece? The MPCC is designed to work with a DSLR, that's why it has a working distance of 55mm. To reach focus with a DSLR (or a camera with MPCC), the focusser must be moved farther inwards than with an eyepiece. On some Newtonians, this is made possible by some extension tubes, which must be removed for photography - otherwise, the focuser tube would be in front of the main mirror.
    On the other hand, there are Newtonians which are designed strictly for visual or photographic use, both by focus travel and size of the secondary mirror. With these telescopes, it may be that they can't provide the backfocus needed for a DSLR or a coma corrector, although you can reach focus with a camera which requires as little backfocus as your ZWO.
    Please check the telescope's manual if there is any information about attaching a cmaera, especially a DSLR.
    Answer by: Baader Web Team (Admin) on Jul 9, 2020 8:19:00 AM
  92. Rated: 24
    7/27/2021 5:55 PM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    I would like to know if the 2" BDS-SC Baader Diamond Steeltrack fits to my Celestron Nexstar 5SE ?

    Answer rated: 9
    Unfortunately this does not fit. Please see here the drawings https://www.baader-planetarium.com/de/downloads/dl/file/id/29/product/2856/bds_sc_dimensions_technical_drawing.pdf
    Answer by: Baader Web Team (Admin) on Jul 28, 2021 11:23:00 AM
  93. Rated: 24
    10/9/2017 8:36 AM Fluorite Flatfield Converter (FFC) / 3x-8x
    There’re some discussions about FFC on the web, it seems to designed for photography, do you know anyone using it in visual?

    Answer rated: 48
    As this product was designed to provide perfectly round stars - without increasing their size - to cover the 90 mm diameter field of a 6x6 medium format camera,
    the performance is even much more impressive when it is used visually. Many people call it "worlds sharpest barlow lens" - we don´t disagree.
    Answer by: Baader Web Team (Admin) on Oct 9, 2017 8:37:00 AM
  94. Rated: 24
    8/10/2020 5:33 AM Baader 10mm Hyperion 68° Modular Eyepiece
    Can the Baader 10mm Hyperion 68° Modular Eyepiece be adapted to a Celestron Ultima 80 spotting scope?

    Answer rated: 11
    No, the Ultima spotting scopes don't support eyepieces with 1.25" nosepiece. Only the Hyperion 8-24mm Zoom can be adapted - there, you can remove the nosepiece and screw it into the Ultima spotting scope. This is not possible with fixed-focus Hyperion eyepieces.
    Answer by: Baader Web Team (Admin) on Aug 17, 2020 1:21:00 PM
  95. Rated: 23
    10/23/2019 9:08 AM Baader 2" ClickLock Diagonal Mirror M68 thread (Zeiss)
    I’m considering buying your M68 diagonal as part of a project to widen my optical path. It is clear how to connect this to a refractor that has various MXX connections. I also have a legacy 6 in Celestron SC and am not sure how to connect the M68 diagonal to the 2 in screw. It would be obvious which of your adapters to use if I had eg a 9.25 Edge but the step down to the smaller one on the C6 is not clear. I do not want to use the 2in diagonal.

    Answer rated: -13
    You can equip the standard 2" Clicklock star diagonal with a M68-thread using Baader M55/M68 (Zeiss) Adapter for 2" CL-Stardiagonal # 2956110 (https://www.baader-planetarium.com/en/baader-m55m68-(zeiss)-adapter-for-2%22-cl-stardiagonal.html), but then you still have a 2"-star diagonal basically.

    The M68-star-diagonal hasn't got this simple option for reconfiguration to 2"-SC-thread. But you can use

    - Baader M68 Conversion Ring # 2458195 to change the male M68-thread of the star diagonal to a female thread (https://www.baader-planetarium.com/en/baader-m68-conversion-ring.html)
    - M68 to 2" UNFi Conversion Ring # 2458232 to change the female M68 to female SC-thread (https://www.baader-planetarium.com/en/m68-to-2%22-unfi-conversion-ring.html)
    - Baader 2" NexStar locking ring. # 2458270 as a counter nut to set the orientation of the star diagonal at the telescope (otherwise it would stop wherever the thread ends). https://www.baader-planetarium.com/en/baader-2%22-nexstar-locking-ring..html

    Of, course, this isn't a cheap solution as one more adapter is required, but I'd recommend the NexStar Locking ring whenever you want to screw a star diagonal onto a Schmidt-Cassegrain.
    Answer by: Baader Web Team (Admin) on Oct 23, 2019 9:09:00 AM
  96. Rated: 23
    3/7/2017 2:34 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I recently purchases a 2" Baader Clicklock visual back to use with my EdgeHD 8" SCT. My issue is that the system is too tight and binds up. When I put a 2" diagonal or eyepiece into the clicklock and go to lock it I can only get about 1/2 of the rotational movement before it gets tight to the point of binding up.

    Is this an issue or is it designed like this? I also thought that the part would be smooth when rotated, but I can feel distinct clicks so to speak. I just want to make sure that this unit is good and not defective, and I have never use this type of system before

    Answer rated: -13
    What you describe is completely normal. You only have to turn the lever by about 15 - 20° - if really the 2" barrel has the correct standard diameter. The lever moves much further in order to provide secure clamping action also for badly undersized 2" sleeves/barrels, which we have seen in this industry. A 15-20° turn for standard eyepieces will already put a lot of force onto a 2" barrel - you will note that it will hold your eyepiece or diagonal very firm and securely. You should not try to tighten it up as hard as you can! There is no need to extend a large force when clamping an eyepiece.

    The distinct clicks are part of the design. This was designed to let people hear and feel the lever position also in the dark.
    Answer by: Baader Web Team (Admin) on Mar 8, 2017 11:27:00 AM
  97. Rated: 23
    9/9/2019 2:27 PM Baader 2" Nosepiece with 2" filter thread
    Can I use this to connect a 2 inch Celestron diagonal to a Baader clicklock clamp?

    Answer rated: 7
    Probably...

    If you want to equip any 2" star diagonal with a ClickLock, you can always use
    Baader 2" ClickLock 37 mm extension #2956237
    or
    Baader 2" ClickLock 47 mm extension #2956247

    If you want to replace the nosepiece of a star diagonal with this nosepiece, it depends on the star diagonal. If you can remove the original nosepiece and if you can then access a female SC-thread (2" 24 GZ 60°), then you can replace one nosepiece with another - although this shouldn't make too much of a difference?

    If you can remove the clamp of the star diagonal and can then see a male 2" SC thread, you can use the Baader 2" ClickLock SC/HD (2") clamp (C5" - C9¼") #2956220 to replace the original clamp.


    Answer by: Baader Web Team (Admin) on Sep 9, 2019 4:20:00 PM
  98. Rated: 23
    5/21/2021 6:59 PM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    I have just received this item. I can’t identify how to find the M43 photo thread. The manual says “when you remove the extendable eyecup..” But how do you remove the eyepiece?

    Answer rated: 25
    This is mentioned on page 6 of the manual. You simply screw the eyecup up to the uppermost position, where there is a small stop. Then, you screw it a little bit more - this is only a stop, so when you screw forther, you remuve the eye cup and can access the M43-thread.
    Answer by: Baader Web Team (Admin) on May 26, 2021 11:08:00 AM
  99. Rated: 22
    3/14/2021 11:12 PM Baader FlipMirror II Star Diagonal
    Vorrei chiedervi gentilmente, con quale precisione superficiale, è stato lavorato lo specchio, RMS ed errore di picco/valle, in quanto nelle specifiche, non è indicato.
    Grazie

    Answer rated: -2
    Please excuse, but for the purpose of this mirror, this indication of optical flattness is irrelevant.

    The mirror quality allows for flawless sharpness up to 300x magnification and it is good for any kind of guiding method.

    Please keep in mind that the sales price is below € 200.-

    In case you could trust us that we have given this product the same care as with our other Baader-products, we are quite convinced that you could be satisfied. Especially when we had been checking other flip-mirror qualities, to find that theirs is unpolished coated float glass.
    Answer by: Baader Web Team (Admin) on Mar 15, 2021 11:44:00 AM
  100. Rated: 22
    12/21/2020 9:30 PM Glasspathcorrector 1:1,70 for Baader-Binoviewer with T-2 thread (MaxBright II® and MaxBright®)
    I have a SCT 8". If I use the 1.7 GPC, will it do the same as using a barlow (magnify)? Or I am not understanding how it works.
    If it does magnify what is the difference result using one or the other? Thanks!

    Answer rated: -12
    A glaspath corrector is not a normal barlow. It extends the focal length like a barlow but corrects the color fringing that happens when the light goes through the prisms of an binocular. Means when you use the Glaspath corrector without an binocular, you will have an overcorrection and this will lead to colour fringe around stars. We have different glaspath correctors with different extension factors because the higher the extension factor the further out is the focal point. You can choose between x1,25 wich gives only slightly higher magnification but does not extend the focal point very far out. The x2,6 version has a very high magnification and places the focal point very far out so that even with short Newtonian telescopes it becomes possible to reach focus with an binocular.
    Answer by: Baader Web Team (Admin) on Dec 22, 2020 8:43:00 AM
  101. Rated: 22
    8/22/2018 2:56 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Do I use a M56 or M57 Clickloc for a skywatcher 72mm Evostar refractor. Thanks Chris

    Answer rated: -9
    We do not have every telescope in stock, and sometimes the specifications change - so, if the thread isn't mentioned in your telescope's manual, it is the best if you measure it yourself.
    We have described how to do it here: https://www.baader-planetarium.com/en/blog/clicklock-clamp-for-your-telescope/
    Answer by: Baader Web Team (Admin) on Aug 27, 2018 8:45:00 AM
  102. Rated: 22
    12/26/2020 6:36 AM Baader MaxBright® II Binoviewer with case
    First Merry Christmas!
    I wonder if someone can help me. I have the original Binoviewers Maxbright and I want to change the screws (6) that hold the eyepieces with "knurdle" kind, easier to change eyepieces. Can you please tell me the size, someone said they are M4. But not sure. Are they metric? Coarse thread, etc.
    Really appreciated, I have many of your products and very happy with them.
    Thanks again.

    Answer rated: 10
    Hello,

    the first version has had M4x0.7metric. The following versions have M3x0.5 metric.

    Best regards

    Baader Web Team
    Answer by: Baader Web Team (Admin) on Jan 11, 2021 9:27:00 AM
  103. Rated: 22
    12/28/2020 3:35 AM Carl Zeiss 1¼" Abbe Barlow lens 2x
    To get this Balow to 3x, which Varilock should I buy? The Varilock 29 or the Varilock 46? Thanks a lot.

    Answer rated: -15
    You need an additional 70mm between the eyepiece clamp and the Barow.
    For an eyepiece, this can be done with a 40mm tube and two 15 mm tubes.
    For photography, you need to know the back focus/flange focal distance of your camera (55mm for a camera with T-2-adapter, or anything down to ca. 6mm for CCD-cameras.
    For a video module/planetary camera, where the sensor is close to the 1.25" nose piece (and thus similar to an eyepiece), we'd recommend the 40mm T-2-extension # 1508153 and the 20-29mm VariLock # 2956929
    Answer by: Baader Web Team (Admin) on Dec 29, 2020 1:34:00 PM
  104. Rated: 22
    9/30/2020 1:57 PM Baader Double Polarizing Filter
    My Baader Hyperion 5mm Eyepiece without his ruber ring offers two thread : M43 and SP54 (male) What ring adapter model is necessary for use a 2" filter like this one : Baader Double Polarizing Filter 2" ( #2408344) ? It seems I need a "female 48 / female SP54" ? Thank you

    Answer rated: -1
    Placing a 2" filter behind the eyepiece will cost you a lot of eye relief - the 2" double polarizing filter will cost you 15mm, so that you will have only 5mm of eye relief remaining.

    It might be possible with Baader DSLR-2" Filter Holder M48/SP54, # 2408166, but I didn't try it out - it has got a length of 5mm, then you'd have no more eye relief and wouldn't be able to look through the eyepiece...

    You can insert 2"-filters between the 1.25" nosepiece and the 2" body of the eyepiece, but this will change the focal length of your eyepiece to ca. 4-4.5mm as described in this PDF: https://www.baader-planetarium.com/de/downloads/dl/file/id/134/product/1209/hyperion_eyepieces_application_examples.pdf

    The recommended solution would be a 2"/1.25"-reducer with 2" filter thread, if your telescope has got a 2"-focuser: https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/eyepiece-clamps.html?filter_adapters_type=244&filter_threads_lenssided=575
    Answer by: Baader Web Team (Admin) on Oct 1, 2020 10:19:00 AM
  105. Rated: 22
    4/25/2017 2:58 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I have a Celestron Edge HD 8" SCT. After a few months using the 40mm kit eyepiece, I'm looking to purchase a couple of Hyperion eyepieces. What ClickLock components would be required to mount this?

    Answer rated: 30
    To use 2"-accessories with an SCT or EdgeHD, we recommend the following parts:
    #2956220 SC-Clicklock (for 6", 8", 9¼") or #2956233 SCL-ClickLock (11", 14")
    #2956100 Baader 2" ClickLock Diagonal Mirror or #2456115 Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
    optional: #2956214 Baader 2" to 1¼" ClickLock Reducer (T-2 part #15B) (all Hyperion an Morpheus eyepieces can be used with the 2" barrel; this reducer is only necessary for 1,25" eyepieces)

    Especially if your telescope is mounted on an Alt-Az mount, you can use the Baader 2" NexStar locking ring #245827 instead ot the SC-ClickLock to permanently mount the mirror at the back of the telescope - if you remove the nosepiece from our star diagonals, you get an SC-thread which fits directly at the telescope. This way, so can save some space and do not risk that the telescope hits the base of the mount when you point it high at the sky.
    Answer by: Baader Web Team (Admin) on Apr 26, 2017 8:57:00 AM
  106. Rated: 22
    3/16/2020 11:10 PM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    I have the Hyperion Universal Zoom Mark IV and wondered if you have an adapter to connect it to a Canon Powershot G9 camera so that I can take afocal photos. Thank you.

    Answer rated: 34
    As far as we can see from the specs which are online, the camera does not have a filter thread to use lens filters, so no direct connection to the eyepiece is possible. May the camera's manual or your photo dealer know if external filters can be used - then we'd need to know the filter thread.

    Without a filter thread, the only option is a camera stage like our Microstage II Digiscoping Adapter # 2450330
    https://www.baader-planetarium.com/de/microstage-ii-digiscoping-adapter.html
    Answer by: Baader Web Team (Admin) on Mar 17, 2020 8:44:00 AM
  107. Rated: 22
    7/15/2020 9:26 PM Baader Wide-T-Ring Nikon Z (for Nikon Z bajonet) with D52i to T-2 and S52
    I don't think I received the right answer to my question on connecting a Nikon Z6 to a Celestron EdgeHD 8.

    According to Celestron, the back focus distance for the EdgeHD 8" is 133.3mm.

    The Nikon Z series has got a flange distance of 16mm, the Wide T-ring is 8.3mm long, so in total its 24.3mm. The Celestron t-adapter is 50mm long for a total of 74.3mm.

    Your answer said I needed 30.7mm of distance, but don't I still need 59mm of distance (133.3 - 16 - 8.3 - 50 = 59)?

    Answer rated: 5
    Maybe the mistake is that there are twi different T-Adapters so please see this two links (sorry only german):

    https://www.celestron.de/ce_de/t-adapter-f%C3%BCr-edgehd-8.html
    https://www.celestron.de/ce_de/t-adapter-(c5-6-8-9-14-11-14).html

    The EdgeHD T-Adapter #93644 is 78,3mm long and needs an extension of 30,7mm that it fits your camer/bayonet ring.
    The T-Adapter #93633-A (second link) is 50mm long and could be used too. Just keep in mind that you need then of course
    different distance rings/extensions.
    Answer by: Baader Web Team (Admin) on Jul 16, 2020 9:36:00 AM
  108. Rated: 22
    5/9/2017 8:39 AM
    Is this made of aluminium or steel? The bar that comes with C8 scope is aluminium and seems to be too soft for screws on AVX mount.

    Answer rated: 2
    This is hard-aluminum and the fit onto the Celestron OTA is better than with the original dove-tail.
    It is no probem though if the screw will make an imprint into the aluminum. Still we use a harder variant of aluminum. Steel would be impossible because most mounts would be overweighted.
    Answer by: Baader Web Team (Admin) on May 11, 2017 2:48:00 PM
  109. Rated: 22
    8/15/2021 8:52 AM 2" BDS-RT Baader Diamond Steeltrack Focuser
    Do you have an RT which will fit a William Optics Zenithstar 66 SD?

    Also is the ZWO EAF compatible with this focuser?

    Answer rated: 4
    Much to our regret, we are unable to keep track of all industries telescopes and adaptation necessities. There are a number of dealers that specialize in adapting our equipment onto telescope-brands that we ourselve do not carry in our own portfolio. Maybe please do a google search using the necessary keywords to find a dealer that sells these brands and can give you advise.
    Answer by: Baader Web Team (Admin) on Aug 16, 2021 9:03:00 AM
  110. Rated: 22
    1/26/2021 7:31 PM Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
    Do you have a dimensioned line drawing available for the 2" BBHS mirror diagonal? I'm designing a carrying case for lenses and accessories and want to include room for the future purchase of this diagonal. Thanks.
    Barry

    Answer rated: -26
    Unfortunately we have no drawing that fits for this purpose. We can only recommend to buy the mirror before cutting the foam
    Answer by: Baader Web Team (Admin) on Feb 1, 2021 11:28:00 AM
  111. Rated: 22
    5/1/2021 7:01 PM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    Am i right in thinking, to rotate the entire focuser housing after installation to align with the OTA, its the 6 black flat head screws that loosen to allow this to be achieved ?

    Answer rated: -1
    Yes, by setting the screws not too tight, you have a slipping clutch. You can also replace one of the screws with a thumb screw (it is a M5 thread, if I remember correctly).
    Answer by: Baader Web Team (Admin) on May 3, 2021 8:23:00 AM
  112. Rated: 22
    8/31/2022 10:59 PM Baader T-2 adjustment/spacer-rings
    what diameter t2 spacer rings

    Answer rated: 0
    The outer diameter of our T-2 spacer-rings is 46 mm, the inner diameter 42 mm.
    Answer by: Baader Web Team (Admin) on Sep 2, 2022 9:29:00 AM
  113. Rated: 22
    10/4/2022 9:02 PM Carl Zeiss 1¼" Abbe Barlow lens 2x
    Can you please confirm the exact Focal Length I need to make 2.5x magnification and 3x magnification?

    I see the diagram says 70mm? but one of the responses was that it is 65mm?


    Answer rated: 13
    There seems to be a mistake in the answer, because it was based on the PDF for the VIP-barlow. Please refer to the diagram for the magnifications, it's an additional 70mm for 3x.
    You need ca. 32-35mm to reach 2.5x.
    Answer by: Baader Web Team (Admin) on Oct 5, 2022 4:09:00 PM
  114. Rated: 22
    3/8/2021 3:24 AM Baader Tripod Adapter Flange for NexStar SE / EVO
    What are the options (hole and spacing) for attaching to a T-POD 110/130?

    Answer rated: 12
    Please see our technical drawing of the T-Pod head:
    https://assets.baader-planetarium.com/media/extendware/ewimageopt/media/inline/ea/7/baader-t-pod-aluminium-tripod-95-130cm-e95.jpg
    The flange gets mounted with three screws on the 6xM5 60° LK D77
    Answer by: Baader Web Team (Admin) on Mar 10, 2021 12:58:00 PM
  115. Rated: 21
    1/13/2020 5:29 PM Fluorite Flatfield Converter (FFC) / 3x-8x
    I'm considering Baader FFC for magnifying Venus image through U-Venus filter. Is this better transparency with UV around 350nm wavelength than the other conventional ones such as your VIP 2x barlow.

    Answer rated: 23
    The sharpness performance is definitely better. Only the attenuation through the glass is comparable. In the FFC there are two elements of pure fluorite crystal. This is outstandingly transparent at 350 nm.
    But there are two more elements from regular molten glass also in this lens collection. Therefore the pure amount of "normal" glass is about the same.
    Nevertheless the transmission at 350 nm should be 90%.
    Answer by: Baader Web Team (Admin) on Jan 17, 2020 8:11:00 AM
  116. Rated: 21
    10/25/2019 9:04 PM Filter cell 1¼" classic (8mm height)
    What is the internal diameter of the filter cell? I am intending to use these filter cells to house several 25mm OD / 5mm thick filters. Will the smaller filter fit and be secured with the locking ring?

    Answer rated: -28
    Unfortunately, this will not work - the filter cell has got a clear aperture of 26.5mm, so a 25mm-filter would just fall through the filter cell.
    Answer by: Baader Web Team (Admin) on Oct 28, 2019 9:00:00 AM
  117. Rated: 21
    2/13/2018 7:14 PM Fluorite Flatfield Converter (FFC) / 3x-8x
    What is the Strehl ratio of the FFC at 393nm? I know this is not designed for solar use, but I really need a corrector optic for the calcium k-line wavelength because almost all telescopes have zero correction below 400nm. I would like .95 strehl or greater at 393. anything less than .9 is unacceptable. I do have suitable energy rejection filters and a thermal shield, so there will be no exposure damage thresh hold. You guys make a hydrogen alpha imaging telecentric but do not make a k-line telecentric, and there are none on the market. I must either make one myself or find an optic somewhere.

    Answer rated: -4
    The FFC is NOT a telecentric system. Also it is NOT meant to be subjected to UV-wavelengths without prefilter such as an AstroSolar Film. And then the transmission at CaK will be much too low.

    Also an auxillary optical system cannot correct the missing optical correction of the telescope optics (unless it is specifically designed for this purpose).
    Answer by: Baader Web Team (Admin) on Feb 14, 2018 9:27:00 AM
  118. Rated: 21
    6/12/2018 3:00 AM Baader DSLR-2" Filter Holder M48/SP54
    What diameter filter fits inside of a 2" filter holder? Also how can I equip my lens with a 52mm thread to the 48mm filter holder?

    Answer rated: 3
    For a 52mm lens, you need:
    - Baader DSLR-2" Filter Holder M48/SP54 # 2408166
    - Baader Hyperion DT-Ring SP54/M52 for DT-Adapter II&III and Hyperion Eyepieces # 2958052

    You can screw all mounted 2"-filters into the filter holder which use the astronomical 2"-thread of aproximately M48x0.75 or M48x0.6 (we try to make our threads so that the common 2"-filters fit, although there is no real standard for this thread.)

    Our filter-cells like # 2459252L are made for round filters with a diameter of 47,4mm and offer a free aperture of 46,9mm.
    Answer by: Baader Web Team (Admin) on Jun 12, 2018 8:15:00 AM
  119. Rated: 21
    5/8/2022 7:57 AM Baader MaxBright® II Binoviewer with case
    When might you expect Baader MaxBright II Binoviewer to be in stock again. I placed my order with HighPoint Scientific ten months ago, and still you have not had stock. Then can not even give an estimate. I need to know if these will be shipping in the next 2 months or I need to cancel my order and find a different bino viewer. 10 months wait is ridiculous.

    Answer rated: 8
    We understand your anger. Please believe us, we would love to deliver to any of our customers promptly. We also make a living from selling our products, so we have the highest interest in stocking and delivering as much as is needed. But unfortunately we had do deal with many different and new problems in the last 1-2 years like problems with material procurement, failures in production, problems with freight routes. All that lead to the unfortune situation that we currently have, that many products are not availabe. We will have a first batch of Maxbright binoculars for sale in the next few weeks but we have far more orders and reservations than we can deliver with this production run. So there will be many customers who will still have to wait, and unfortunately we cannot say when we will deliver to whom, delivery is strictly on a "first come, first served" basis. Thank you for your continued patience! You will be rewarded with a high quality product in the end.
    Answer by: Baader Web Team (Admin) on May 9, 2022 8:43:00 AM
  120. Rated: 21
    9/29/2019 1:39 AM Baader Fringe Killer Color Correction-Filter
    Will the Baader Fringe Killer filter reduce chromatic aberration for DSLR white-light Solar imaging in achromatic refractors with neutral-density Baader AstroSolar film?

    Answer rated: 1
    Yes it will - this is the purpose of this filter.
    Answer by: Baader Web Team (Admin) on Sep 30, 2019 11:34:00 AM
  121. Rated: 21
    1/18/2022 11:58 AM Baader Prism Diagonal T-2/90° 32mm
    Please can I ask if I can use my "2 Clicklock T2 with this Diagonal and use my 2" Eyepieces without distortion etc ?

    Answer rated: 6
    Usually yes - we have used similar setups with a 36mm Hyperion and didn't notice vignetting.
    But this may depend a little bit on the f/ratio of the telescope - slower telescopes will work better very faster ones, both because of the width of the beam of light and the potential of colour aberrations. You may find this article interesting, which compares mirrors and prisms: https://www.baader-planetarium.com/de/downloads/dl/file/id/160/product/1237/testreview_mirror_vs_dielectric_vs_prism_diagonal_comparison_w_paolini.pdf
    Answer by: Baader Web Team (Admin) on Jan 19, 2022 4:11:00 PM
  122. Rated: 21
    1/2/2020 3:27 AM Baader L-RGB CCD-Filterset
    Are the Baader LRGB filter sets parfocal?

    Answer rated: -9
    Yes, all filters of a set have the same thickness (usually 2mm for filters in a filter cell and 3mm for filters withoiut filter cell).
    Answer by: Baader Web Team (Admin) on Jan 7, 2020 3:00:00 PM
  123. Rated: 21
    1/4/2020 1:54 PM Baader Neodymium (Moon & Skyglow) Filter
    Waqas already asked similar but few years have passed. I've noticed you have a kind of universal adapter. Basically I want to use this filter with as many lenses I can. But you've stated the thread here is a telescope thread. How should I go about using the filter with my camera lenses? I have step up and down rings from the 80s to the 40s in mm but i suspect they're useless for this thread.

    Answer rated: 6
    The answer provided to the other question is still valid. The most important adapter to use our 2" Filters with camera lenses is our DSLR-2" Filter Holder M48/SP54 (#2408166). https://www.baader-planetarium.com/en/baader-dslr-2%22-filter-holder-m48sp54.html
    Based from the SP54 thread, we have lots of Step Up- and Down Adapters, our "Hyperion DT-Rings".

    Please check out also our detailed PDF on Digiscoping:
    https://www.baader-planetarium.com/en/downloads/dl/file/id/444/product/1769/digiscoping_camera_adaptations_for_afocal_photography_and_eyepiece_projection.pdf
    Answer by: Baader Web Team (Admin) on Jan 7, 2020 10:52:00 AM
  124. Rated: 20
    10/27/2021 2:50 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I already have a Baader Clicklock #2956254 - M54ax1 fitted to my Skywatcher 150PDS reflector. I want to fit a Baader Steeltrack focuser to it and wondered if the S58 #2956258 Clicklock adaptor was available separately so I could swap it over? Seems a waste if not.

    Answer rated: -9
    While both ClickLocks use indeed the same base ClickLock clamp and only differ in the used M54 and S58 adapter, those adapters are each glued permanently into the ClickLock in order to provide a safe and sturdy connection. Unfortunately that means that they cannot be exchanged.
    Answer by: Baader Web Team (Admin) on Oct 29, 2021 2:24:00 PM
  125. Rated: 20
    9/3/2017 4:07 AM Baader UHC-S / L-Booster-Filter
    My ZWO filter wheel takes 31mm unmounted filters. Can a 1-1/4" be unmounted and fit?

    Answer rated: 15
    Mounted 1.25" filters have got an external diameter of ca. 31mm *including* the housing, the free aperture is a little bit smaller, as well as the filter glass itself (ca. 28mm). So, it will not work with a 1.25"-filter which was removed from the filter cell.
    But the filterwheel should have a ca. M28.5-thread (the standard 1.25"-filterthread), so that you can insert the mounted filter, anyway.
    Answer by: Baader Web Team (Admin) on Sep 4, 2017 9:45:00 AM
    Answer rated: -21
    Thanks for the detailed answer. Looking back as to why ZWO offered 31mm filters, the reason is the ASI1600 camera I'm using at f2 has vignetting with 1.25 filters. Post will fix that, just preferred 31mm.
    Answer by: David Weiszbrod on Sep 5, 2017 2:27:54 AM
  126. Rated: 20
    2/6/2020 6:32 PM Baader UFC (Universal Filter Changer)
    Ich habe kameraseitig den UFC T2 male Adapter, gibt es auch einen UFC T2 female Adapter um auch ZWO Kameras ohne den Umkehrring anschließen zu können? Oder gibt es dafür eine andere Lösung?

    Answer rated: 5
    Diesen Adapter mit Innengewinde führen wir nicht. Das Außengewinde der Kamera würde sonst in die UFC Basis hinein ragen, der Filterschieber
    somit anstoßen.
    Answer by: Baader Web Team (Admin) on Feb 7, 2020 10:02:00 AM
  127. Rated: 20
    10/13/2016 5:19 PM Baader H-alpha 35nm CCD Filter
    I have bougth an used filter #2458380, but on the body filter, in the original Baader label, is written "H-Alpha 45nm Passfilter 2" wIR-cut.
    Since in your catalog the #2458380 is 35nm filter, my question is: there where an old version with same P/N but different band?
    Thanks a lot in advance for your help.
    best regards

    Answer rated: -2
    Yes it is true - the older filters had 45 nm bandpass.
    Answer by: Baader Web Team (Admin) on Oct 14, 2016 8:32:00 AM
  128. Rated: 20
    3/31/2017 6:16 PM RCC I, Rowe Coma Corrector
    Where can I find the documentation for the RCC-I?
    At least a drawings showing where to measure the 91.5 mm back focus would be helpful.

    Answer rated: 21
    Our translator was quicker than expected. The english product description is now available.
    Answer by: Baader Web Team (Admin) on Apr 3, 2017 11:24:00 AM
    Answer rated: 3
    Unfortunately the detailed description of this product hasn't been translated to english yet, we apologize. We will do that very soon. Meanwhile you could switch to the german website and use Google Translate or a similar tool.
    Unfortunately we do not have a drawing for this product. The Backfocus of 91.5mm is measured from the T-2 thread.
    Answer by: Baader Web Team (Admin) on Apr 3, 2017 9:53:00 AM
  129. Rated: 20
    10/16/2016 6:12 PM Baader 2" ClickLock Diagonal Mirror
    Is the 2" ClickLock Diagonal Mirror (# 2956100) threaded for standard 2" filters? Thanks!

    Answer rated: 12
    Yes indeed, it is threaded for 2" (M48) filters.
    Answer by: Baader Web Team (Admin) on Oct 24, 2016 9:01:00 AM
  130. Rated: 20
    1/29/2021 11:55 PM Baader FlipMirror II Star Diagonal
    I have a Skywatcher 150/750 PDS with a back-focus of 86mm. This Newtonian reflector is optimized gor astrophotography. Flip mirrors are generally not compatible with reflectors. However, in this case, given the optical path of the Baader flip mirror, would it be possible to use it on my scope? If so, how? Thank you.

    Answer rated: 17
    This might just work, but it depends on the backfocus of your camera and eyepieces. Also, there is probably no way to adapt a coma corrector.

    The sortest adaptation to the telescope would probably be 2" / S52 Nosepiece # 2958551

    The field stop of the eyepiece mus be as far away from the flipmirror as the camera sensor, so it also depend on whether you use a planetary camera, a DSLR or a mirrorless camera. We recommend Baader Focusing Eyepiece Holder 1¼" / T-2 (T-2 part #08A) # 2458125 with a length of 29-35mm, so it should be no problem wit a video module for images of the planets - especially with an eyepiece like the Baader Classic Orthos, where the field stop is inside of the nosepiece. Or you use a low-profile eyepiece clamp like Ultrashort 1¼" / T-2 Clamp # 2458121, which might be the better choice.

    For photography with a larger sensor, you'll probably want to use a coma corrector instead of the flip mirror.
    Answer by: Baader Web Team (Admin) on Feb 1, 2021 1:17:00 PM
  131. Rated: 20
    9/15/2019 12:47 PM Baader UV/IR Cut / L-Filter
    What is the height of the Baader 1 1/4 Mounted uv ir Filter in mm . thankyou

    Answer rated: -1
    The outer diameter of our 1.25" filters (including the cell mount) is 31 mm.
    Answer by: Baader Web Team (Admin) on Sep 16, 2019 8:31:00 AM
  132. Rated: 20
    7/3/2017 9:24 PM Baader 2" Amici-erecting-prism 90° with 2" holder and 2" sleeve
    I would like clarification on the threads / interfaces with the prism holder body. You state the Lens Side has both an inner connection that is M48-.75mm thread and an outer connection 2" barrel....does the 2" barrel screw into the M48-.75mm thread in the prism holder body? or is the interior of the 2" barrel threaded with M48-.75mm? On the Eyepiece side, is the clamp removable at all? Is it threaded in or pressed fit in? If either, please specify. Do you have a CAD model of the assembly you can share?
    Thanks, James Riall

    Answer rated: 9
    The 2"-nosepiece of the prism has got an M48-thread for 2"-filters, so you can attach 2"-filters in front of it. The nosepiece is removable and also attached with an M48-thread to the housing.

    The eyepiece clamp is not removable.

    I'm sorry, but we can't publish CAD-drawings of the housings - there is too much "Cut&Paste-Copying" in the times of the internet.
    Answer by: Baader Web Team (Admin) on Jul 5, 2017 9:53:00 AM
  133. Rated: 20
    1/18/2017 10:37 AM Baader D-ERF Energy Rejection Filter (75 - 180mm)
    Is it possible to use a cheaper ERF (energy rejection filter) from another manufacturer or dealer for the SolarSpectrum H-Alpha filters than the D-ERF?

    Answer rated: 35
    We absolutely must point out that an ERF from another dealer may void the warranty of the SolarSpectrum H-alpha Filter, so that repairs may be payable even during the warranty period.

    You can buy cheaper standard ERFs, but they don't meet the same specifications as our D-ERF. Simple energy rejection filters are made of red dyed glass (Schott RG 610 or Schott RG 630). These are long pass filters which let all energy beyond ca. 570nm pass - this includes the full near infrared spectrum (heat radiation) above 630nm.

    The heat at the focal point behind such an ERF filter is three times higher than behind one of our D-ERFs. This way, the immersion oil in the stack of block-, polarization and Etalon-filters will boil away. An H-Alpha-filter which is permanently overheated this way will age very fast. We can not cover this with our 5-year-warranty.

    By the way: The coloured glass of these simple ERFs is rather "soft" and chemically unstable, so it can degrade over the years. The soft glass melt tends to form streaks. If they are not coated simple ERF-filters will age because of the oxygene in our atmosphere, and after some years the surface will get rough, and contrast is lost. When we were still using this glass, we had to check each and every filter on our optical bench, and many filters failed the double pass test.

    The problem with the glass quality of an RG 610 remains even when it is coated with an UV/IR-reducing coating. We tried this, too, with our C-ERF (Cool ERF), but we abandoned it after some years. The soft glass often got warped during the coating procedure, so that even less filters were useful after being coated. Our experiences with this combination lead to the development of the D-ERF (Dielectrical ERF).

    There are dealers and manufacturers who still offer such ERF or C-ERF filters but do not test them as thoroughly on an optical bench as we did. This is the reason why there are many cheaper C-ERFs and ERFs on the market - but the customer will pay for the cheaper costs a much higher price: a reduced image quality and a reduced lifespan of the H-Alpha filter, compared to a high-quality D-ERF.

    Our D-ERF filters are made of very homogeneous, fine-polished BK-7-glass without streaks. They are coated with great effort with a dielectrical coating system which is age-resistant and fine-tuned for the Solar Spectrum filters.

    A Solar Spectrum filter will outplay all its benefits (resistance to aging, sharpness and contrast) only in combination with a D-ERF, and only with this combination can we guarantee its resistance to aging. Especially a Research Grade Filter requires a good D-ERF. Every chain is only as strong as its weakest link.

    Answer by: Baader Web Team (Admin) on Jan 23, 2017 10:39:00 AM
  134. Rated: 20
    1/25/2017 10:21 PM Carl Zeiss 1¼" Abbe Barlow lens 2x
    Do you know what the lens element to imaging plane distances are for 2x, 3x and 4x operation? Also the text says no loss of quality at 3x then elsewhere it says no loss of quality up to 4x. Is 4x okay or is that a misprint?

    Thanks
    Martin

    Answer rated: -3
    In standard configuration, the Barlow is set up for 2x magnification. If you add another 64mm, the magnification increases to 3x. We do not recommend much higher distances/magnifications, mainly because of mechanical reasons.

    You can extend the magnification of many Barlow lenses by increasing the distance, as explained e.g. in this PDF:
    http://www.baader-planetarium.com/en/downloads/dl/file/id/240/product/1062/calculating_different_magnifications_with_the_vip_barlow.pdf
    The image quality decreases slowly, so there is no "hard break" beyond which a Barlow can not be used - it also depends on the complete optical system.
    Answer by: Baader Web Team (Admin) on Jan 30, 2017 1:57:00 PM
  135. Rated: 20
    2/2/2017 9:35 AM
    Does Baader offer modification service to convert the Canon DSLRs to a "full-spectrum" DSLR, i.e. providing a camera without any filters to restrict the pass-band of radiation to the camera sensor?

    Answer rated: 7
    No, unfortunately we do not offer such a service.
    Answer by: Baader Web Team (Admin) on Feb 2, 2017 10:08:00 AM
  136. Rated: 20
    8/30/2020 6:36 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I have a Celestron Edge HD 11" SCT. Is the #2956257 S57-ClickLock what I need to convert the included 2" mirror diagonal to a clicklock adapter? Thanks!

    Answer rated: -11
    We are not sure which specific star diagonal Celestron included with your telescope, but if the eyepiece clamp can be removed, it is probably with a thread. The S52 is a ring dovetail with 52mm diameter.

    Chances are good that a SC-thread is used. If you can remove the eyepiece clamp from the star diagonal and screw it onto the 2"/SC-thread on the back of your telescope, then you can use Baader 2" ClickLock SC/HD (2") clamp (C5" - C9¼") #2956220. This clamp has got a female thread; If you need a ClickLock with a male SC-thread, you can convert it with Baader 2"/2" Inverter Ring with 48mm filter thread # 1508020.

    Otherwise, we'd need to ask you to measure the thread of your specific star diagonal as described here: https://www.baader-planetarium.com/en/blog/clicklock-clamp-for-your-telescope/
    Answer by: Baader Web Team (Admin) on Sep 2, 2020 10:18:00 AM
  137. Rated: 20
    6/5/2020 2:22 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    What do I need to connect my SBIG ST-8300M to my CPC800XLT SCT? What will be the back focus of the ClickLock system?

    Answer rated: 14
    For the C925, you can use Baader 2" ClickLock SCL (3.3") clamp (C9¼" - C14") #2956233
    https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/eyepiece-clamps/baader-2%22-clicklock-eyepiece-clamps.html#574=931
    to use any camera with a 2" nosepiece. It has got a length of 40mm. The ideal backfocus of a Schmidt-Cassegrain is about 5" (a little bit omre for the C925, see https://www.celestron.com/blogs/knowledgebase/what-are-the-optimum-back-focus-distances-for-celestron-scts
    So, to use it the perfect distance, you may want to get closer to this with an extension like Baader 2" ClickLock 47 mm extension #2956247 or some other extension tubes. But you'll reach focus without the extension, too.

    Celestron provides a T-adapter to SC which gives you the right distance, but it uses only the T-thread (M42x0.75) and will cause vignetting on a full-frame sensor (and is also calculated for a DSLR with 55mm flange distance.
    Answer by: Baader Web Team (Admin) on Jun 5, 2020 3:00:00 PM
  138. Rated: 19
    9/4/2020 5:50 AM Baader UFC (Universal Filter Changer)
    Please advise on the parts needed to connect a Nikon Z6 camera to a Takahashi FSQ-106ED. Thank you.

    Answer rated: -18
    A typical adaptation would be, from the camera to the telescope:
    Baader Wide-T-Ring Nikon Z (for Nikon Z bajonet) with D52i to T-2 and S52 # 2408335
    Baader S52 dovetail Camera-Adapter for Wide-T-rings (optical height: 2 mm) # 2459119
    Baader UFC Base (Filter Chamber) telescope-sided S70 dovetail receptor (optical height: 13 mm) # 2459110
    e.g. Baader UFC S70 / M48 (f) Telescope-Adapter (optical height: 1 mm) # 2459129, if our telescope has got a M48-thread, or e.g. Baader UFC S70 / 2" SC-thread (f) Telescope-Adapter (optical height: 1 mm) # 2459128 plus Baader 2" Safety Kerf nosepiece with 2" filter thread # 2408156 to use it with a standard 2" focuser.

    If you have a thread at your telescope which you want to use, we'd need to know its specifications - we do not have the data of all telescopes available. If you need a special length, there are extensions available, too.
    Answer by: Baader Web Team (Admin) on Oct 5, 2020 12:36:00 PM
  139. Rated: 19
    9/30/2020 8:38 AM Universal Alan Gee II - Telecompressor (UAG II)
    I have a C8 EdgeHD with a UFC in front of the flip mirror. I’d like to use the UAG II along with the Maxbright II binoviewers. Is this possible? How much if any does the UAG II add backfocus?

    Answer rated: -6
    This should be no problem, you can screw the UAG-II with the provided T-ring onto the T-thread upper port of the FlipMirror.
    Unfortunately, we have never measured the change in back-focus, as this is hard to do with an SC/EdgeHD with its moving main mirror.
    Answer by: Baader Web Team (Admin) on Oct 1, 2020 1:11:00 PM
  140. Rated: 19
    4/2/2021 1:10 PM Canon Astro Upgrade for all Canon APS-C DSLR-Cameras
    do you convert EOS 500D? ACF or BCF? any expected time for conversion?

    Answer rated: -2
    EOS 500 is APS-C therefore we can convert. Its BCF filter. Handling time is around 4-6 weeks
    Answer by: Baader Web Team (Admin) on Apr 6, 2021 10:31:00 AM
  141. Rated: 19
    11/15/2022 2:03 PM Baader Hyperion 68° Eyepiece Set (Starter)
    Forgive me if this is a foolish question, but why do you not supply a nosepiece to replace the negative lens in the Hyperion series ? This would enable me e.g. to use my 21mm as a 32.2 mm in my 1.25" diagonal for little extra cost.

    Answer rated: -1
    Mike: your question is not foolish ... I thought the same thing when I looked at the brochure. I was disappointed at the "Baader Team" answer !! It seems they don't understand the "ask a question" rule of thumb --- "If one person asks ... there are at least one hundred more that wondered, but were too "afraid" to ask ! " Part 2 --- There one Thousand more that didn't even think about it, but now that the question has been asked, They think it's a good idea too! Thanks for not being afraid to ask ! There are no dumb questions -- there are only people that don't have answers ! Now let's hope the "Baader Team" wakes up . I want a "BLANK" nose piece to do the same thing!!
    Answer by: Grant Blakely on Nov 24, 2022 6:11:26 PM
    Answer rated: -5
    To be honest, that's the first time that someone has asked for such a nosepiece, so there probably is no market for this. But you can use the Baader Expanding Ring T-2f / M48m (T-2 part #29) # 2458110 to adapt the Baader 1¼" T-2 nosepiece with Safety Kerfs # 2458106 to the Hyperion eyepiece.
    Answer by: Baader Web Team (Admin) on Nov 16, 2022 12:06:00 PM
  142. Rated: 19
    1/8/2021 3:35 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Do I attach the Baader Click-Lock SCT adapter (2") to my scope by just screwing it on firmly, or should I also tighten the six grub screws?

    Answer rated: -8
    Simply screw it on the OTA. It should hold without tightening on the screws
    Answer by: Baader Web Team (Admin) on Jan 10, 2021 12:16:00 PM
  143. Rated: 19
    10/20/2020 7:54 PM Glasspathcorrector 1:2,60 for Baader-Binoviewer
    Is it available the GPC housing alone (without the lens) ?
    If yes could you inform about the part number?

    Answer rated: 32
    No, unfortunately the housing alone is not available as individual item.
    Answer by: Baader Web Team (Admin) on Oct 21, 2020 7:53:00 AM
  144. Rated: 19
    8/27/2019 5:31 PM Baader VariLock 46, lockable T-2 ExtensionTube 29-46mm with spanner tool (T-2 part #25V)
    I have a baader varilock. It connects to DSLR with a camera t adapter - but how do you attach to a dedicated astronomy camera like a zwo?
    Setup: corrector - flattened t-adapter - varilock - camera/Nikon t-adapter
    Now I want to use zwo camera. Need connector or something.
    Also: Can I connect a Clicklock to the varilock?

    Answer rated: -8
    To attach a video module without a T-thread, you can use the adapter
    Baader C-Mount T-2 with integrated 1¼" Filterholder # 2958520

    You may need an additional T-2-extension to achieve the correct back-focus as specified in the manual of camera or corrector.

    There is also Baader 1" C-Mount-Adapter with 1-1/4" Nosepiece length 18mm # 2958515, if you want to use a camera in a st6andard 1.25"-focuser.

    To use eyepieces or a camera with 1.25" nosepiece, we also offer several 1.25" eyepiece clamps with T-2-thread, including one ClickLock:
    - Baader ClickLock Eyepiece Clamp 1¼" with built in diopter-adjustment # 2458100

    Without ClickLock, there are e.g.:
    - Baader Focusing Eyepiece Holder 1¼" / T-2 # 2458125
    - Ultrashort 1¼" / T-2 Clamp # 2458121
    - Baader Variable Locking / Sliding T-2 Focuser # 2458010
    Answer by: Baader Web Team (Admin) on Aug 28, 2019 10:34:00 AM
  145. Rated: 19
    9/8/2021 2:31 PM BCF 2 - DSLR Astro Conversion Filter for Canon Full-Format Cameras (all latest Models)
    I bfc2 campatible with 6d mark 1?

    Answer rated: 17
    Yes this filter fits in 6D I
    Answer by: Baader Web Team (Admin) on Sep 8, 2021 2:49:00 PM
  146. Rated: 19
    6/30/2017 3:53 PM Baader Multi-Purpose Vario Finder 10x60 (single or with MQR-IV finder holder)
    I want to use this finderscope as a 61mm achromatic refractor piggybacked on my 8" SCT, when not "finding". Am I giving too much confidence to this little scope?

    Answer rated: 15
    We think you planned use can very well be supported by this scope.
    You will have to get used to the sliding focuser but it can be managed well with a little goodwill.
    Answer by: Baader Web Team (Admin) on Jun 30, 2017 4:17:00 PM
  147. Rated: 19
    1/26/2017 3:39 PM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    Can you recommend a reducer to use with Mk IV zoom? I want to reduce the magnification min/max range ... THX

    Answer rated: 8
    You can increase the max. magnification with the Hyperion Barlow. The combination of Mark IV and Barlow results in focal lenghts from 3,6 - 10,7
    To reduce the focal length of your telescope however, in order to increase the field of view (= less magnification) is more difficult. A reducer has to be calculated to optically match your telescope brand and model, otherwise you may not be able to reach focus and the image quality might be horrible, with an enormous amount of field curvature and/or spherical aberration

    Unfortunately reducers are not our speciality, since we only offer reducers for very few such special optics. Also please note that the reducers that we do offer (such as the Alan Gee Telecompressor #2454400 - calculated for C8 or higher Schmidt-Cassegrains) are all mainly optimized for photography and cannot be used in combination with prism or mirror diagonals since the optical backfockus just is not enough.

    Sorry, this is quite a complex area. For this reason we never offered a "universal" reducer for lowering magnification during visual observation.
    Answer by: Baader Web Team (Admin) on Jan 26, 2017 4:31:00 PM
  148. Rated: 19
    8/26/2020 4:15 PM 2" BDS-RT Baader Diamond Steeltrack Focuser
    Can this be used on a Zeiss APQ 150/1200? (without any modification, of course). Thanks

    Answer rated: 0
    This is possible without modification of the Zeiss telescope. But you will need an special manufactured adaptor to attach the focuser to the Zeiss telescope. This adapter costs appx. 125 EUR net plus shipping
    Answer by: Baader Web Team (Admin) on Sep 1, 2020 9:18:00 AM
  149. Rated: 19
    2/26/2021 7:37 PM Baader Single Polarizing Filter
    I use 1 1/4 eyepieces on a SOlar wedge. For nighttime observing, I use a T2 Zeiss prism diagonal with a 2" nosepiece (which sits in a 2" focuser). I already have a 1 1/4 " polarising filter which fits onto my eyepieces. Can I combine this with a 2" polarising filter, to be put before the prism, and use the combination as a variable polariser for lunar observation (i.e. one polarising filter before the prism and a second one after the prism, and conveniently rotating the eyepiece to get the desired dimming)? This would be very practical, if it works, but will this setup be less good than a dedicated 1 1/4 inch variable polariser?

    Answer rated: 21
    Yes, sure, this works!
    Answer by: Baader Web Team (Admin) on Mar 1, 2021 11:55:00 AM
  150. Rated: 19
    7/27/2017 9:20 PM Baader UHC-S / L-Booster-Filter
    Does the filter work with galaxies and clusters?. I have a 80mm refractor. Will it block too much the light of the objects?

    Answer rated: 14
    Filters like UHC or OIII work because emission nebula emit light only at specific wavelengths, so that we can try to block all other (artificial) light sources and let only the light of the nebula pass.

    Stars and galaxies on the other hand shine in all colours, so their light is also partially blocked. There are no filters for stars and galaxies; you have to move to a darker observation site. Otherwise, the UHC-S will work also with smaller telescopes.
    Answer by: Baader Web Team (Admin) on Jul 31, 2017 10:41:00 AM
  151. Rated: 19
    6/2/2020 4:59 AM Glasspathcorrector 1:1,25 for Baader-Binoviewer with T-2 thread (MaxBright® II and MaxBright®)
    Is it possible to screw a 1.7x GPC into the front of my 2” T2 diagonal? I currently turn it into the Maxbright II, but that results in just 1.45x. I’d like to move it forward, in front of the diagonal, in order to increase the power. I can’t change the 2” nosepiece because that would require me to add adapters (and light path) to my Tak in order to use a 1 1/4” diagonal nosepiece.

    Answer rated: 16
    You can insert the GPC in our 2"/T-2-nosepiece, if you still have the plastic ring which is included with the GPC. This will give you a higher magnification and is described on page 13 of the manual:
    https://www.baader-planetarium.com/en/downloads/dl/file/id/1614/product/4317/manual_baader_maxbrightr_ii_binoviewer.pdf

    Depending on the GPC (T-2 or Zeiss microbayonet), you may have to turn the lens package around.

    You can change the configuration of the 1.25x and 1.7x GPCs, so that the wide rim of the body faces either towards the eyepiece or the telescope. This way, you can install the lens element in such a way that the convex lens faces towards the telescope as indicated in the small sticker included with the box and shown on top of this page. To do so, you must remove the lens package from the body and install it the other way round.
    Answer by: Baader Web Team (Admin) on Jun 2, 2020 3:25:00 PM
  152. Rated: 19
    10/10/2022 5:38 PM Baader FlipMirror II Star Diagonal
    Can you please tell me what thread adapter or other adapter I would need to go from the back of the Baader Flip Mirror II, which I think is M48, but please correct me if I am wrong, to a Baader 2" ClickLock for Celestron & Meade SCT?

    The reason I am asking is because I purchased several of your products a few days ago. A couple of them being a Baader 2" ClickLock Adapter for 3.25" SCT's and just in case that didn't work I also got the Baader 2" ClickLock for Celestron & Meade. Well, the Baader 2" x 3.25" worked flawlessly. Now I'm left with an expensive Baader 2" ClickLock for Celestron & Meade SCT.

    So, what I'd like to do is mount the Baader 2" ClickLock for Celestron & Meade SCT on to the back of the Baader Flip Mirror II to make it easier to mount my DSLR to the back of the flip mirror, but I am unsure of the specific thread adapter/s I would need to make it work. So, I need to go from the back of the Baader Flip Mirror II to the Baader 2" ClickLock for Celestron & Meade SCT.

    Can you please help me figure out what part or parts I will need to make it work? Do you have a thread adapter to make this work and if you do can you please provide me with the Baader part number/s?

    Any help you can offer would be very much appreciated.

    Thank you.
    Sincerely, Rich Williams
    Astor, Florida 32102 USA!

    Answer rated: 2
    If we identify your mentioned left-over ClickLock as our 2" SC/HD clamp #2956220, then this features a female 2" SC thread. The FlipMirror on the other hand has no fixed adapters on either side, only an as-delivered state. So we can't tell for sure which adapter you're using on the back side and which you have maybe left for use.
    If you indeed have an M48 male thread on the backside, you can use the 2" male / M48 female adapter #2454834 to mount the SC clamp:
    https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/m48-adapter-system/2%22a--m48i-zero-length-reducing-piece-(no-optical-height).html
    If you have a T-2 female thread, you can use the 2" male / T-2 male adapter #1508035
    https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/2-inch-sc-thread/baader-adapter-2%22-(male)--t-2-(male).html
    And for a T-2 male thread you could use the 2" male / T-2 female adapter #2958242
    https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/2-inch-sc-thread/baader-expansion-ring-2%22at-2i-with-1mm-optical-path-length-(t-2-part-28).html

    The FlipMirror is really a very versatile tool. Please make sure to read the detailed instruction manual carefully to get yourself familiar with all the included adapters and thus all the adaptation options. https://www.baader-planetarium.com/en/downloads/dl/file/id/1568/product/4285/instruction_manual_baader_flipmirror_ii_star_diagonal.pdf
    Answer by: Baader Web Team (Admin) on Oct 11, 2022 7:25:00 AM
    Answer rated: 2
    Dear Baader,

    After looking over the instruction manual you sent me the link for now this looks like I need to go into a female S52 thread on the back of the Flip Mirror II. Or whatever the native thread is without any of the adapter rings that come with the Flip Mirror II. I have all of the adapter thread rings removed and so now I need to go from whatever that female thread is on the back of the Flip Mirror II to your 2" SC/HD clamp #2956220, with this female 2" SC thread.

    I apologize for not asking my question in a more definitive manner. I hope it is more clear now that I want to go from the back of the Flip Mirror II with no adapter rings installed to the 2" SC/HD Clamp #2956220 with the 2" female SC tthread. So I need a Baader adapter with 2 different male threads on it. I'm hoping now you can tell me the correct adapter ring I need to use since I rephrased my question.

    I'm sorry for repeating so much but I just want to make sure there are no misunderstandings so I'm not buying any unnecessary parts.

    As always Baader, thank you for your help.

    Sincerely, Rich Williams
    Astor, Florida 32102 USA!
    Answer by: Richard Williams on Oct 12, 2022 4:38:48 PM
  153. Rated: 18
    6/23/2021 4:04 PM Alan Gee Telecompressor Mark II (T-2 part #20)
    what year of production?

    Answer rated: 14
    The optical design of the Alan Gee goes back to the 1990s. But the actual products which we ship are freshly assembled every approximately two months, so they are new.
    Answer by: Baader Web Team (Admin) on Jun 25, 2021 12:08:00 PM
  154. Rated: 18
    10/27/2021 10:46 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    What click lock model do I need to fit a Skywatcher 72ed?

    Answer rated: 199
    The original 2" clamp is made with a M54x1 male thread so you´ll need the #2956254 M54a x 1-ClickLock (Skywatcher / Orion).
    Answer by: Baader Web Team (Admin) on Oct 28, 2021 8:31:00 AM
  155. Rated: 18
    7/3/2021 9:30 PM Fluorite Flatfield Converter (FFC) / 3x-8x
    Could be used with RASA 8"?

    Answer rated: 4
    Unfortunately there is not enough backfocus on the RASA to make this work. The RASA is designed for f/2 and we have not yet heard about successful experiments with barlow lenses a.s.o.
    Answer by: Baader Web Team (Admin) on Jul 5, 2021 9:11:00 AM
  156. Rated: 18
    8/28/2017 12:20 PM Hyperion Zoom 2.25x Barlow lens
    How to increase magnification app to 4x, i read that T-extenders will do the trick, but of what length? Is the possibility to achieve 3x magnification?
    Best regards
    Krzysztof

    Answer rated: -67
    You can increase the magnification of a Barlow by expanding the distance between lens and field stop. We have described the formula and calculations in this PDF: http://www.baader-planetarium.com/en/downloads/dl/file/id/240/product/1062/calculating_different_magnifications_with_the_vip_barlow.pdf
    You can find T-2 extension tubes (with variable and fixed length) at http://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/astro-t2-system.html?filter_adapters_type=237&limit=36
    Answer by: Baader Web Team (Admin) on Aug 30, 2017 9:01:00 AM
  157. Rated: 18
    2/6/2020 7:03 AM Baader CCD Complete Filterset II (L-RGB-C / H-alpha 7nm / OIII 8.5nm / SII 8nm)
    I use a light sensitive sony A7S system camera for astrophotography. Is this filter set the most suitable/best set for a light sensitve system camera ?

    Answer rated: 7
    RGB-filters are only necessary for monochrome cameras, as they are requires to combine monochrome-images to a colour image.

    S-II might work, but a standard DSLR (without astro-modification) camera is not very sensitive for this part of the spectrum. These narrowband filtersets are better suited for a monochrome camera, as with such a narrowband filters always only a part (for red only every fourth) pixel is used.

    If you aren't in a too light-polluted region, you're better off with a UHC-S or - if you are focussing on planetary nebulae and supernova remnants - maybe an O-III filter. Then you can use the whole sensor at one time.
    Answer by: Baader Web Team (Admin) on Feb 6, 2020 8:21:00 AM
  158. Rated: 18
    2/22/2018 2:31 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I have two questions about the 2" ClickLock 2" CL-Extension 47mm.

    1) How long is the overall length of this adapter including the 2" nosepiece. I know the optical length is 47mm, so how long is the attached 2" nosepiece?

    2) How deep can a 2" eyepiece be inserted into this adapter? I have a 2" eyepiece with a 38mm nosepiece. Will I be able to seat it all the way in?

    Thanks,
    Steve

    Answer rated: -10
    The length over all is 74mm so the 2" nose piece telescope side is 27mm long (74mm-47mm). The ClickLock body takes 2" barells up to 36mm deep.
    Answer by: Baader Web Team (Admin) on Feb 22, 2018 8:39:00 AM
  159. Rated: 18
    2/27/2022 4:34 AM Baader 2" / 90° Astro Amici-Prism with BBHS ® coating
    I own a new Stellarvue SVX 130T f7 refractor. Is this scope too fast to be used in this high end amici prism diagonal? I understand it works well with long f ratios. Is 7 not applicable? Perhaps the non amici version is better suited for f7 refractors? Thanks. Davis.

    Answer rated: 5
    The amici prism will work well with your telescope
    Answer by: Baader Web Team (Admin) on Feb 28, 2022 9:21:00 AM
  160. Rated: 18
    9/16/2017 5:33 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Which Baader 2" ClickLock should i choose for my meade lxd55 emc 127 mm refractor ?
    Thanks !

    Answer rated: 25
    Unfortunately, we do not have the technical data for all telescopes on the market, especially not for older models. To answer your question, we would need to know which threads are available on your focuser. If this information is not included in the manual, you'd have to contact the manufacturer.
    If there is no thread available, but the telescope has got enough backfocus and already a 2" clamp, you can use either #2956237 37mm ClickLock extension or #2956247 47mm ClickLock extension, or even the Baader 2" ClickLock Diagonal Mirror #2956100 - then you don't have the Clicklock at the telescope, but at least you can use it whenever you change the eyepiece.
    Answer by: Baader Web Team (Admin) on Sep 20, 2017 11:21:00 AM
  161. Rated: 18
    10/7/2018 8:34 PM 2" BDS-NT Baader Diamond Steeltrack® Focuser
    Can the Diamond Steeltrack NT focusser be installed on a Skywatcher MN190 without drilling holes?

    Answer rated: 11
    Only our discontinued Classic Steeltrack NT focuser was able using the holes when disassembling the original Sky-Watcher focuser. Then only
    when having the focus wheel axis 45° to the OTA axis.

    Please notice our website for instructions how to mount the Diamond Steeltrack - as you can see there have to be new holes done to mount it.
    You need to have access to the inner tube holding the nuts but the Makstutov Correctore is closing it - I´m sorry.
    Answer by: Baader Web Team (Admin) on Oct 8, 2018 2:26:00 PM
  162. Rated: 18
    7/27/2020 6:20 PM Baader 2" Amici-erecting-prism 90° with 2" holder and 2" sleeve
    For the prism 2956152 it states that it isn't for high magnification. On an American website however, High Point Scientific, for this model it states that "Correct image diagonals have been used traditionally for terrestrial viewing, and limited to low (under 100X) magnifications. The high quality of this diagonal lets you use much higher magnifications without aberrations or image breakdown". Would this information be incorrect? Many thanks

    Answer rated: 5
    For highest magnifications, we offer Baader 2"/90° Astro Amici-Prism with BBHS ® coating # 2456120 which is made for highest magnifications.

    #2956152 instead is a high-quality Amici prism and better that many prisms which are included in telescopes, but it is not made for highest magnifications.
    Answer by: Baader Web Team (Admin) on Jul 28, 2020 11:25:00 AM
  163. Rated: 18
    6/8/2017 2:16 AM Baader Colour Filters (blue, bright blue, green, yellow, red, orange)
    When the blue filters will be available again?

    Answer rated: 19
    We expect them to be available again in approx. two months
    Answer by: Baader Web Team (Admin) on Jun 8, 2017 8:57:00 AM
  164. Rated: 18
    9/5/2022 11:05 AM Baader Color Filter-Set Moon and Planetary (6 colors)
    Will these colorfilters fit in 1,25" filterwheels (Atik, ZWO)? Will they not be too high/thick and prevent the filterwheel to rotate?

    Answer rated: 14
    The filters are 2mm thick and are mounted in Low Profile Filter Cells with a height of 6mm (without the thread). So far, we know of no filter wheels where they don't fit.
    They were sold years ago in 8mm filter cells - so if you are looking at an older, used set, there may be problems.
    Answer by: Baader Web Team (Admin) on Sep 5, 2022 1:31:00 PM
    Answer rated: 1
    I use this set in my ZWO 5 filter wheel and they fit just fine with no issues.
    Answer by: Mark Ray on Dec 24, 2022 1:34:59 AM
  165. Rated: 18
    4/20/2020 9:59 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    #2956254 M54a x 1-ClickLock (Skywatcher / Orion)
    I have a Quattro and the manual says this is a 54.5mm x 1 thread. I have verified this by threading a 54mm x 1 accessory on to the scope and it was very loose. What exactly is the threading on your ClickLock?

    Answer rated: 4
    It is known that this thread is made with a big tolerance so we decided to do our adapter with a diameter of 54,2mm. It is always a kind of
    gambling producing accessories for other brands. Hopefully Sky-Watcher won´t change it. Lastly our ClickLock will fit fine.
    Answer by: Baader Web Team (Admin) on Apr 21, 2020 10:19:00 AM
  166. Rated: 18
    1/6/2022 7:27 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Is there a click indicating that a lock was achieved?

    Answer rated: -22
    There isn't one loud click when locking is achieved - the diameters of 2" nosepieces vary slightly depending on the manufacture and on how much material was added when the nosepiece was anodyzied or otherwise finished, so the setting point varies slightly between eyepieces.
    There are mana, many "micro-clicks" which you may or may not hear when operating the ClickLock - this sound has changed over time, and many customers prefer a silent Click. So, depending on the model, you may have to be very silent to hear the Click, if you can hear it at all. But the ratchet mechanism is still there and will keep the clamp in place once the eyepiece is locked. You don't need to apply force, just lock it "hand-tight".
    Answer by: Baader Web Team (Admin) on Jan 7, 2022 11:30:00 AM
  167. Rated: 18
    5/13/2022 4:01 AM 2" BDS-RT Baader Diamond Steeltrack Focuser
    Does the focuser interface to a Orion ED80 CT tube which has a 72 mm diameter male dovetail interface.

    Answer rated: 1
    Unfortunately there is no M72 adaptor available. But there are companies that offer custom made adaptors for example www.preciseparts.com
    Answer by: Baader Web Team (Admin) on May 13, 2022 9:27:00 AM
  168. Rated: 18
    4/20/2019 9:23 PM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    Can I use c mount camera to Baader Hyperion Universal Zoom Mark IV. Which adapter I shall select to connect the mark IV to c mount thread camera.

    Answer rated: 7
    Yes, you can - please take a look at page 5 of the PDF https://www.baader-planetarium.com/en/downloads/dl/file/id/444/product/3119/digiscoping_camera_adaptations_for_afocal_photography_and_eyepiece_projection.pdf which we have also linked to in the Downloads section.

    You need
    - Hyperion / Morpheus T-Adapter M43/T-2 #2958080
    - 1" C-Mount T-2 adapter Filterholder #2958520

    And spacers between these two adapters, depending on the size of your sensor and the desired effective focal length. The larger the sensor, the farther away should it be from the eyepiece to avoid distortions at the edge of the image.
    Answer by: Baader Web Team (Admin) on Apr 23, 2019 10:14:00 AM
  169. Rated: 18
    8/1/2017 3:51 PM Baader Neodymium (Moon & Skyglow) Filter
    Which size filter is most suitable for Hyperion eyepieces? Also, where does it attach?

    Answer rated: 28
    The 1.25" version fits to all Hyperion eyepieces except the 31 & 36mm Hyperion Aspheric. They have a filter thread at the 1,25"-barrel. For the Hyperion Zoom, you have to use the 1,25"-barrel (which is possible even in the 2"-configuration with the Mark IV Zoom, but not with the older models).

    If you also use 2" eyepieces, most reducers from 2" to 1.25" like our 2" to 1¼" ClickLock Reducer #2956214 also have a 2"-filterthread included.
    Answer by: Baader Web Team (Admin) on Aug 2, 2017 8:48:00 AM
  170. Rated: 18
    2/10/2017 7:21 AM Telecentric System TZ-4 (4x focal length)
    Can the Baader Telecentric lenses be used like ordinary Barlows, e.g. for visual observation or imaging (from UV to IR) of the planets?

    Answer rated: 24
    A Telecentric is not a Barlow, although it also affects the focal ratio. Its main purpose is to produce a beam of parallel light for H-alpha-filters. The change of the focal ratio is only a side effect.

    Because they are made for H-apha-filters, they are designed for 656.3 nm (the red H-alpha-light); only the TZ3 is also designed to work at 396 nm very good, although then the focal plane is shifted for ca. 5mm.

    For visual observations in other parts of the visual spectrum, you need a Barlow, not a Telecentric.
    Answer by: Baader Web Team (Admin) on Feb 13, 2017 9:24:00 AM
  171. Rated: 17
    8/10/2017 12:24 AM Baader f/2 Highspeed-Filters (H-alpha, O-III, S-II)
    I have a set of these. I was imaging at F2.1 with hyperstar. Could I use them at F3.6 or F5.0? (TAK with 0.73 reducer and native F)
    What degradation or other issues occurs at these slower speeds?

    Answer rated: 25
    Taking into account the high speed systems properties, these filters have a shifted CWL (Central Wave Length), where the peak is not congruent with the H-alpha, SII or OIII emission lines. This shift is calculated carefully and tested in such way that the best images can be obtained with very fast focal ratio telescopes. f/2 and f/3.6 are suitably close to each other, so the CWL does cover the range from f/2 to f/3.5. A telescope with an f-ratio of f/5 or f/10 actually might render a weak signal though.
    Even using these filters at f/3.8 might already result in a small loss of signal - that is - longer exposure time and consequently contrast might suffer a bit. Other than that - due to the mismatch some offband light might reach the chip but it shouldn´t be a huge concern. The most problematic filter is the H-alpha. Both SII and OIII have two emission lines which are close to each-other, so you will still be able to get part of both these lines. H-alpha in comparison to the other two, has a really tight bandwith.
    Answer by: Baader Web Team (Admin) on Aug 16, 2017 3:03:00 PM
  172. Rated: 17
    7/8/2022 12:02 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I just purchased a 2" ClickLock #2956233 SCL (3,3") for a Celestron 9.25 Edge HD SCT, with a back focus requirement of 146 mm. What is the optical length of the ClickLock with a 2" tube fully inserted? I know how to build up my back focus adaptors, but I'm not sure how much the ClickLock adds to the optical path length.

    Answer rated: -21
    The back focus of the 9,25" EdgeHD is 146,05 as you can see in the white paper on page 14:
    https://s3.amazonaws.com/celestron-site-support-files/support_files/edgehd_whitepaper_final.pdf
    Please notice that this length starts from the outermost end of the thread - thereforer you only have
    to consider the 40mm from the #2956233
    https://assets.baader-planetarium.com/media/extendware/ewimageopt/media/inline/72/3/baader-2-clicklock-eyepiece-clamps-from-t-2-to-41-2df.jpg
    Answer by: Baader Web Team (Admin) on Jul 8, 2022 8:38:00 AM
  173. Rated: 17
    7/9/2022 3:47 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Which 2” click lock should I use for my Celestron C5 spotting scope. A standard SCT to 2” adapter fits well, so I assume that the SC/HD (2”) clamp will fit. Please confirm.

    Answer rated: -8
    Yes the #2956220 SC / HD (2")-Clicklock (5" SC, 6" SC/HD, 8" SC/HD and 9¼" SC) will fit onto this OTA
    Just open the grub screw from the ClickLock so that the lever is in your favorit position.
    Answer by: Baader Web Team (Admin) on Jul 11, 2022 9:29:00 AM
  174. Rated: 17
    9/21/2020 9:58 PM Baader 10mm Hyperion 68° Modular Eyepiece
    will this lens work with a Celestron starsense explorer dx 130 or a zhumell Z8

    Answer rated: 15
    Yes, there should be no problem.
    Answer by: Baader Web Team (Admin) on Sep 22, 2020 12:14:00 PM
  175. Rated: 17
    11/6/2021 10:08 AM 2" BDS-RT Baader Diamond Steeltrack Focuser
    Is there an adapter available to add the steeltrack focuser to a series 5000 5" APO?

    Answer rated: 2
    Sorry, we can't answer that question since we don't sell this instrument and don't know the thread size.
    Answer by: Baader Web Team (Admin) on Nov 8, 2021 8:20:00 AM
  176. Rated: 17
    3/6/2018 11:05 PM Baader DSLR-2" Filter Holder M48/SP54
    Hi, could you please tell me what products I would need to fit a 2" filter to a lens of 40.5 mm diameter?
    Thanks!

    Answer rated: -3
    Unfortunately, we do not have a stepper ring for M40.5. You need either a stepper ring from M40.5 to SP54, or to one of our stepper rings.
    We do have:
    M46: DT-ring SP54 / M46 #2958046
    M49: DT-ring SP54 / M49 #2958049
    M52: DT-ring SP54 / M52 #2958052
    M55: DT-ring SP54 / M55 #2958055

    So, you need:
    - Baader DSLR-2" Filter Holder M48/SP54 #2408166
    - One of the stepper rings above. They all have a female (inner) SP54 thread and a male (outer) thread
    - A stepper ring from M46, M49, M52 or M55 to your M40.5-thread. One of these stepper rings should be easily available at your preferred photo-dealer
    Answer by: Baader Web Team (Admin) on Mar 7, 2018 12:06:00 PM
  177. Rated: 17
    11/12/2019 1:20 AM Baader UFC (Universal Filter Changer)
    Will your new upcoming RASA 8 adapter be compatible with 17mm back-focus cameras? Will there be tilt adjustment available for these types of cameras?
    Thanks

    Answer rated: 23
    Yes, this latest addition of the UFC-family - the new RASA 8 / S70 UFC-Adapter (#2459136) which will launch on our website very soon - is compatible with 17 mm back-focus cameras such as ATIK Horizon. The UFC allows to change any kind of filter from 1 1/4" up to 50x50 mm square in front of the RASA 8.

    The only function, that still might be left to desire, is an easier way to reach the front adjustment hex-screws of the RASA 8. Due to the very short backfocus available, it is somewhat difficult to reach these screws and to "tweak" the star sizes in each corner of the image to absolute perfectness.

    So - in order to even reach this goal (exchange filters AND effortlessly adjust the camera tilt), in February latest we will launch a separate product - only produced for the RASA 8: the FCCT (Filter Changer & Camera Tilter). This unit will feature 3D-printed filter sliders and be only able to accept filters in diameters of 31 mm / 36 mm / and 2"(47.4 mm) w/o cell mount. This is a revolution for the RASA 8 since it makes perfect adjustment of all stars in the field a joy. Already now the first imagers are using this solution as prototypes and the results are outstanding, see here: https://www.baader-planetarium.com/en/blog/rasa-8-extreme-images-michael-jaeger-with-ccd-camera-f2-highspeed-filter/
    Answer by: Baader Web Team (Admin) on Nov 13, 2019 4:00:00 PM
    Answer rated: -3
    The RASA 8" UFC-Adapter is now available:
    https://www.baader-planetarium.com/en/baader-ufc-s70-rasa-8-adapter-telescope-sided-with-rasa-thread.html
    Answer by: Baader Web Team (Admin) on Nov 19, 2019 11:42:00 AM
  178. Rated: 17
    10/6/2020 5:39 AM Baader TQC/TCR Heavy duty T-2 Quick Changing System (T-2 part #06A & #07)
    How much weight will this hold? I want to put it in the front of my 8" SCT imaging train which includes: (Baader Heavy Duty Quick Connector) -> Celestron Focal reducer -> Celestron Heavy Duty OAG (w/ZWO ASI1744 mini guide camera) -> ZWO Filter Wheel -> ZWO ASI294mm monochrome camera.

    Hoping that the heavy duty quick change can easily hold this but wanted to ask to be sure.

    Thanks!

    --Ryan

    Answer rated: 11
    We never performed any strength tests "until it breaks", and it is hard to give a number, because this also depends on the lever. But I can lift an 80/600 lens telescope (ca. 3.5kg) easily by holding it only at the accessories, which are connected through the TQC, without any fear or problems (except for the focuser). So, your camera setup should be no problem, too - the quick-changer deserves the name "Heavy-Duty".

    However, for very high loads and when all possible flexure must be avoided, there is also the M68-system, which also includes a quick-changer: https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/m68-zeiss.html
    Answer by: Baader Web Team (Admin) on Oct 6, 2020 9:23:00 AM
  179. Rated: 17
    10/16/2020 12:59 AM Baader SC / HD Ultra Short T-Adaptor, 9mm optical length
    I just purchased a Flipmirror II and I need to connect it to my Meade RCX400 14". Can you give me a list of the exact pieces I need to purchase to make that happen? I'm assuming I need this and a 40 mm extension tube to get to the flip mirror and then a connector to the camera (Meade DSI IV) and connector for 2 inch eyepiece. Also a connector for an off axis guider but I know which one I need for that. Thanks for your help!

    Answer rated: 16
    If your telescope does have a standard 2" SC-thread, you can use this adapter to connect the FlipMirror either directly to your telescope, or through a T-2-extension, if desired.

    You need to bring the camera sensor and the field stop/image plane of the eyepiece into the same distance from the FlipMirror.
    For a 2" eyepiece, you can use
    #2956242 M42i x 0.75-ClickLock (Astro T-2 System) - 36,6mm long
    plus a 1.25"-adapter like
    Baader 2" to 1¼" ClickLock Reducer (T-2 part #15B) # 2956214 - 9.5mm long
    or
    Baader Pushfix Reducer 2" to 1¼" (T-2 part #15a) # 2408151 - 1mm long

    But we usually recommend a 1.25" focussing eypiece clamp instead, to do some fine adjusting between camera and eyepiece. Or you can use a clamping ring to set one eyepiece to the same focus as the camera. Usually, the focus position of several eyepieces is slightly different.

    I can't find the backfocus of your camera to determine how many T-2-extensions you need for the camera.

    Please take a look at this article about determining the correct distances:
    https://www.baader-planetarium.com/en/blog/using-the-flipmirror-the-correct-working-distances/
    Answer by: Baader Web Team (Admin) on Oct 19, 2020 10:59:00 AM
  180. Rated: 17
    1/27/2021 3:35 AM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    Having trouble to connect the zoom Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece to a Stellarvue 45-Degree Correct Image Erecting Prism - 2" -D1035. Do I need a adaptor ?
    Thank you

    Answer rated: 1
    Our eypiece barrel is produced exactly on the right size. It happens very rarely that it doesn´t fit in another manufacturers eyepiece clamp, the misfit is the clamp, not the eyepiece. Adaptors other than the 2" and 1,25" barrels that are supplied with the eyepiece, are not available.
    Answer by: Baader Web Team (Admin) on Jan 27, 2021 8:40:00 AM
  181. Rated: 17
    1/29/2021 9:52 PM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    I have a Hyperion Zoom mark IV eyepiece which I use with a 16" f/4,5 Newtonian reflector.
    Will it work properly if the coma corrector base element/main body is screwed directly into the 2" barrel of the Hyperion Zoom eyepiece?
    Sincerely, Joachim

    Answer rated: 5
    No, this will not work - the distance from the nosepiece to the refence plane is 31,5mm, the MPCC requires 55+/1mm.
    You need the MPCC in T-2-configuration plus
    Baader Expanding Ring T-2f / M48m (T-2 part #29) # 2458110 - optical length 2.5mm, placed inside of the 2" nosepiece of the Hyperion Zoom
    Baader VariLock 29, lockable T-2 ExtensionTube 20-29mm with spanner tool (T-2 part #25Y) # 2956929, set to 21mm.
    similar to the setup described for 2"-eyepieces on page 10 of the MPCC-manual at http://www.baader-planetarium.com/en/downloads/dl/file/id/483/product/3004/mpcc_mark_iii_instruction_manual.pdf
    Answer by: Baader Web Team (Admin) on Feb 1, 2021 1:49:00 PM
  182. Rated: 17
    11/8/2018 7:25 PM Baader Hyperion 68° Eyepiece Set (Starter)
    Do I need to remove the 1 1/4" barrel when fitting these lenses to a telescope with a 2" focuser?

    Answer rated: 1
    No. There are lenses in the 1,25" barrel, if you remove it, you will have a wide angle eypiece with long focal lenght and poor correction. More useful tips can be found in the manual: in the download section of the product page https://www.baader-planetarium.com/en/downloads/dl/file/id/155/product/1208/hyperion_eyepieces_instruction_manual.pdf
    Answer by: Baader Web Team (Admin) on Nov 9, 2018 9:40:00 AM
  183. Rated: 17
    11/18/2018 9:22 PM Laser Colli - Mark III
    I have an original (?) LaserColli which I use on reflecting telescopes. Can I use it on refractors ?

    Answer rated: -3
    As written on the product page this item is useful for reflecting telescopes. There are other tools available for refractors like Chesire eyepieces
    Answer by: Baader Web Team (Admin) on Nov 19, 2018 10:29:00 AM
  184. Rated: 17
    11/18/2017 7:09 PM 2" BDS-RT Baader Diamond Steeltrack Focuser
    I am the owner of a Vizen ED103SWT refractor.
    I would like to change the focuser with your steeltrack RT, is it possible? Wich kind of adapter is useful for?
    Regards. Giorgio

    Answer rated: 10
    There are so many different telescopes on the market and we don´t sell Vixen so please contact a Vixen dealer to be sure what thread is on your
    telescop. As you can see under "related products" we have a M88x1 and M93x1 adapter availabe.
    Answer by: Baader Web Team (Admin) on Nov 20, 2017 8:31:00 AM
  185. Rated: 17
    12/4/2017 5:46 PM
    I have a Celestron C11 with losmandy dovetail. Am I correct in thinking that this clamps onto the dovetail and creates a handle for manoevering the telescope OTA onto the dovetail? Great idea!

    Answer rated: 11
    Yes, it clamps onto the 3" Losmandy dovetail.
    We would recommend adding another dovetail on the upper side of the telescope - then you can leave the clamp on the telescope when you put it on the mount, and not only use it for carrying it around.
    Answer by: Baader Web Team (Admin) on Dec 6, 2017 8:29:00 AM
  186. Rated: 17
    6/3/2021 11:33 AM Baader K-Line Filter 1¼" (double stacked)
    Why are there no Baader K-Line 2 "(double stacked) filters?

    Answer rated: 8
    1. because the price would become prohibitive - in the range of €1000.-
    2. because the filter cell would need to be ~ 12 mm high - a killer criterium for most users as there is not enough space in the optical train.
    3. since lucky imaging cameras have small chips - not needing larger filterrs than 1 1/4"
    4. BECAUSE WE ÀBSOLUTELY DO NOT WANT TO SUPPORT LOOKING AT THE SUN IN UV-LIGHT !!!
    Answer by: Baader Web Team (Admin) on Jun 4, 2021 1:27:00 PM
  187. Rated: 17
    5/6/2019 3:29 PM Baader M68/S68 Changer to fit Zeiss adapter system (dovetail clamp only)
    Can you please tell me if this will fit over a 39.7 mm circular male dovetail.

    Answer rated: 4
    The inner clear diameter of this item is 61,5mm so it should work. More technical data is to find under the link <specification> at the website.
    Answer by: Baader Web Team (Admin) on May 7, 2019 9:18:00 AM
  188. Rated: 17
    1/4/2020 3:26 AM Mark V Großfeld (Giant)-Binocular
    Is a glasspath corrector necessary for use on an SCT to correct color? I plan to use a Mark V on a Celestron 14 and do not want to add more focal length and higher power than the C14 already has. Thankyou for the answer.

    Answer rated: -13
    At f/10, the light path of the telescope is parallel enough that you can usually work without a glasspath corrector, although it may still be interesting to achieve further magnifications.
    Answer by: Baader Web Team (Admin) on Jan 7, 2020 8:37:00 AM
  189. Rated: 17
    6/2/2020 3:53 PM Baader 36mm Hyperion Aspheric 2" Eyepiece
    Can this eyepiece be used in "eyepiece projection" configuration as telecompressor (speed booster)? I need to fit moon from my Celestron C11 on an APS-C sensor (~14mm diam Moon)

    Answer rated: 9
    No, eyepiece projection will always increase the effective focal length and give you a higher magnification.

    You need a Telecompressor like the Alan Gee # 2454400 - but even there with a factor of .59, the moon would probably be slightly too large with a focal length of 1652mm. You can increase the reducing factor by increasing the distance with additional T-2 extension rings, but the image circle will also become smaller. The image circle of the Alan Gee is 15mm, so it should just work - but this so close to the edges of the specifications that it should be tested at the moon - and it can make a difference if the moon is in apogee or perigee.

    But you can use the Hyperion 36mm, attach a smartphone e.g. with the Celetron NeXYZ smartphone adapter and use your smartphone camera to take pictures of the complete moon.
    Answer by: Baader Web Team (Admin) on Jun 3, 2020 8:52:00 AM
  190. Rated: 17
    12/8/2020 9:10 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Hi, I have a binoculars 20x80 skymaster pro
    The eyepiece is 40mm, can i use the 90 dgree eyepiece with it so I can easily look up!
    Or any other product can serve this purpose?

    Answer rated: 19
    Unfortunately there is no possibility to add an 90 degree prism to an normal binocular like Celestron Skymaster. The reason is simply that there is not enough focus travel in the binocular mechanic wich is designed to be as small as possible to be easily carried. Therefore even if you would mechanically adapt an prism, you cannot reach focus, the image would not be sharp. For this reason there is also no mechanical adaption available. There are astronomical binoculars available were you can exchange eyepieces from brands like Vixen, but these are big and heavy, cannot be hold in the hand, need tripods - and are way more expensive than a Celestron Skymaster.
    Answer by: Baader Web Team (Admin) on Dec 9, 2020 9:20:00 AM
  191. Rated: 16
    9/3/2020 5:29 PM Baader 2" Nosepiece with 2" filter thread
    I have bought the Steeltrack for SC (Celestron Edge HD). Can I screw this nosepiece to the telescope side of the Steeltrack and by doing so use the Steeltrack on a scope with a 2" connection??? I am aware that there could be an issue with back-focus distance.

    Answer rated: -5
    A little unusual but of course you can use the diamond steeltrack with this nose piece. Only thing is that I´d prefer this nose piece instead:
    https://www.baader-planetarium.com/en/baader-2%22-safety-kerf-nosepiece-with-2%22-filter-thread.html
    The savety groove can cause a tilt - depends on the clamp. The nose piece with kerfs is without this trouble.
    Answer by: Baader Web Team (Admin) on Sep 4, 2020 10:43:00 AM
  192. Rated: 16
    6/6/2019 11:59 AM Ultra Narrowband S-II CCD-Filter (4,5nm)
    Recently i started to use BAADER ULTRA-NARROWBAND H-ALPHA 3,5 NM FILTER and i am very pleased !

    Because my regular BAADER S-II 8 and O-III 8.5 filters create much larger and blured stars than Ha 3.5 i am considering to order also ULTRA-NARROWBAND 4.5 nm OIII and SII but before i do that i need to know if this filters produce stars with the same size and similar halo to Ha 3.5 nm ??

    Please send me answer or link to sites where i can find this information !

    Answer rated: 14
    On all these new Ultra-Narrowband-Filters we have done our utmost in the selection of the costliest coating materials, to come up with a filter design that suppresses Halos to the max - by optical design. Anyone can create the similar transmission characteristics with much less expensive "rare-earth" materials. But inevitably such a manufacturer then does end up to accept less effective off-band-blocking and more stray-light to go into halos around stars.

    However - there is no standard-ideal configuration of optical surfaces placement within the optical train. If there is a flattener lens involved "anything" can happen. We have seen Halos, produced by flawed coatings of the camera window or produced by reflections stemming from retro-reflection due to the radius of reducer/corrector lenses in the optical train but NOT of the filter coatings (easily visible when rotating the filter itself). We have seen Halos go away when changing the filter distance to the chip plane asf. And if the distances of the filter position between chip plane and reducer of flattener lenses work for 656.3 - it does NOT mean that the same optical distance will work equally well at 501 nm.

    We "think" we have done all we can. You will need to judge when putting our filters to the test in your optical train (with the willingness to do some testing and searching for the optimum placement of the filter within the given space).

    And when the result does leave something to be desired (and each and every O III-filter on this earth will show more residual halos around very bright objects than an H-alpha-filter), then you possibly could arrange "right of return" with your dealer.
    Answer by: Baader Web Team (Admin) on Jun 6, 2019 4:28:00 PM
  193. Rated: 16
    12/24/2020 8:13 AM Alan Gee Telecompressor Mark II (T-2 part #20)
    I Wish to attach your Alan Gee Telecompressor to an older Meade 16” LX200, F/10, so I can attach a spectrograph that operates at F/5. What additional adapters do I also need to purchase?

    Thank you,
    Ron DiIulio, Director
    Astronomy Program
    University of North Texas, USA

    Answer rated: 11
    We do not know the baffle diameter of your telescope, so if you have a 2" eyepiece holder, it's probably the best if you use Universal Alan Gee II - Telecompressor (UAG II) # 2454405. That's the same optic set, but inside of a 2" body and with T-2-threads on both sides. It is not at the perfect position, but should be close enough.
    The compressing factor depends on the distance to your camera/spetrograph, more information on calculating this factor can be found in the manual in the download section.
    Answer by: Baader Web Team (Admin) on Dec 29, 2020 12:42:00 PM
  194. Rated: 16
    9/18/2020 12:47 PM Baader FlipMirror II Star Diagonal
    I would like to use your "flip mirror" as a ligth sources selector with my leitz microscope (LED cool ligth or halogen one); to do this I would like to replace the adapter rings with Leitz ones on two sides of the unit; the third one will be used for straigth connection to microscope inlet (by a locked coupling ring).
    Do you think it is feasible? may you send me a tech drawing with ring holes on the three sides?
    I thank you in advance for your kind answer.
    Best regards

    Answer rated: 11
    We are sure that our FlipMirror II can serve your intended purpose. However we ask you kindly for your understanding that we can't give out more detailed drawings then what has been published on our website already. Please check out the product images which inlude also a drawing. All threads are also explained in detail in the instruction manual.
    Answer by: Baader Web Team (Admin) on Sep 21, 2020 8:53:00 AM
  195. Rated: 16
    1/24/2019 6:04 AM Alan Gee Telecompressor Mark II (T-2 part #20)
    Will it work on Meade ACF scts?

    Answer rated: -1
    The Meade ACF optics is a coma corrected system so unfortunately the Alan Gee Telecompressor won´t work with it because it is made
    for classic Schmidt-Cassegrain telescopes.
    Answer by: Baader Web Team (Admin) on Jan 24, 2019 11:06:00 AM
  196. Rated: 16
    10/31/2021 11:07 PM StarAid Revolution Standalone Autoguiding - Revision B
    Hi, I am considering the purchase of a standalone autoguider. I am using a Skywatcher 200/1000 Newtonian scope with EQ5 Pro GOTO .What do I need to make StarAid rev. B work with my configuration please? Can you recommend all the parts I need to order please?


    Answer rated: 6
    The StarAid has no own optics so you´ll need a guiding telescope. One option can be:
    https://www.baader-planetarium.com/en/qhy-miniguidescope.html plus # 1485010 adapter ring.

    Answer by: Baader Web Team (Admin) on Nov 2, 2021 4:03:00 PM
  197. Rated: 16
    10/10/2016 11:34 AM Baader OTP 60W Outdoor Telescope Power Switching Power Supply
    Does it fit to the Vixen Sphinx SXW mount? The mount needs a power supply 12V DC, 3A
    The power supply must provide plug with following specs:
    Tip positive
    Plug Dimensions:
    outer diameter 5.5 mm,
    inner diameter 2.1mm)
    Plug Type: "M-plug"

    Answer rated: -9
    Our 60W outdoor power supply does support 3A, having a tip positive connector with 5,5/2,1mm.
    So it looks like it will fit to your mount.
    Answer by: Baader Web Team (Admin) on Oct 10, 2016 11:34:00 AM
    Answer rated: -23
    After further evaluation with the customer and seeing more images, we came to the conclusion that it doesn´t fit the Vixen mount after all unfortunately.
    Even if the measurements seem to be similar it is clear that male and female sockets are the other way round. Voltage and current are fine, but you would have to get a custom made adapter or to cut off the connector from our power supply and remount a Sphinx like one.
    Answer by: Baader Web Team (Admin) on Oct 11, 2016 8:49:00 AM
  198. Rated: 16
    2/21/2022 11:03 PM Baader 13mm Hyperion 68° Modular Eyepiece
    The 13 mm Hyperion says I can use fine tuning rings. What is the difference between a 13 mm Hyperion with a tuning ring or just purchasing an 8 mm Hyperion eyepiece? Do I lose clarity or brightness or? Thanks for your reply!

    Answer rated: 13
    Changing any eyepiece designs lens spacings from the original optimised distances will always deteriorate optical performance. However the Hyperions were designed with the goal to make this deterioration gradually and as mild as possible.

    So for sure an 8 mm Hyperion will perform better than a stretched 13 mm - BUT - modifying the Hyperions provides the opportunity to check out how a certain telescope configuration will perform under higher magnification - without buying the ep first and - then - finding out.

    So in the end - this modding feature is meant to provide ability to experiment. It would become quite tedious if you were to unthread spacers all the time when changing magnification. So as soon as you know for sure you want an 8 mm ep - then obtaining that will be the way to go.
    Answer by: Baader Web Team (Admin) on Feb 23, 2022 9:41:00 AM
  199. Rated: 16
    3/28/2017 3:24 PM
    Tell me, please, will this tail be compatible (# 2451101) with Celestron CPC 1100 Edge HD? And if not, what advise? Thank you!

    Answer rated: 3
    Yes, this dovetail bar fits perfectly. Please see also the PDF under the tab "Downloads":
    http://www.baader-planetarium.com/en/downloads/dl/file/id/131/product/1136/manual_for_mounting_the_baader_dovetail_bar_z_and_v_at_celestron_c8_c_925_and_c_11_sc_and_hd_optics.pdf
    Answer by: Baader Web Team (Admin) on Mar 28, 2017 3:54:00 PM
  200. Rated: 16
    1/3/2021 5:36 PM Baader Wide-T-Ring Nikon with D52i to T-2 and S52
    I have a Hyperion 13mm lens and I would like to mount a Nikon D3200 Camera with a Tring mount. Can I do that?

    Answer rated: 6
    Just see our PDF according digiscopy at page 4. In short the extender ring should be in length the diagonal of the sensor:
    https://www.baader-planetarium.com/en/downloads/dl/file/id/444/product/1211/digiscoping_camera_adaptations_for_afocal_photography_and_eyepiece_projection.pdf
    Answer by: Baader Web Team (Admin) on Jan 4, 2021 12:40:00 PM
  201. Rated: 16
    6/28/2019 12:02 PM 2" BDS-RT Baader Diamond Steeltrack Focuser
    I have a 2 inch Baader Diamond Steeltrack RT. Can you please confirm the function of the tension brake screw? When this screw is loosened, both the coarse and fine focus knobs can be turned. However when I tighten this screw, the coarse focus knob locks, but the fine focus knob can still be turned and the drawtube and the fine focus knob move as normal. Also when I tighten this screw, focus shifts. Is this correct behaviour, or should tightening this screw lock both knobs and the drawtube. This is not clear in the manual. Thanks.

    Answer rated: 16
    What you are experiencing is normal. The tension brake screw, as the name suggests, is used to inrease or decrease the tension on the focuser, changing like this the force required to move the focuser. Eventually when the screw is tightened, it functions as a brake and the focuser doesn't move anymore. In this case, the coarse focus knobs cannot be turned, but the fine coarse yes. However this movement isn't translated into focus change due to a gearbox built in the mechanics of the focuser. As for the focus shift, it is a mechanical play created from the needed tolerances. When you tighten the screw, it causes the whole focusing mechanism to be pulled toward you, until it is totally play free.
    Answer by: Baader Web Team (Admin) on Jul 3, 2019 2:59:00 PM
  202. Rated: 16
    7/19/2021 8:12 AM Optical Wonder™ Set (Cleaning Fluid and Cloth)
    Am I able to get this product in the US?

    Answer rated: 8
    Unfortunately, exporting it to the USA commercially is almost impossible. We'd recommend to contact our distributor in the US, www.alpineastro.com, for cleaning fluids available in the USA.
    Answer by: Baader Web Team (Admin) on Jul 20, 2021 3:22:00 PM
  203. Rated: 16
    3/4/2022 11:47 AM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    I need to use this focuser on a telescope with a very short backfocus. The scope has a 2"-24 (SC) male thread.
    I see that this focuser has a min. height of 93mm but it is mentioned that this S58 adapter can be used to reduce the height to 80mm: https://www.baader-planetarium.com/en/baader-2%22-clicklock-eyepiece-clamps.html#574=936

    My question is: can the focuser with the S58 adapter can fit on the 2"-24 (SC) male thread?

    Answer rated: 0
    The S58 adaptor is not on the telescope side, there is a 2" inner thread that fits on the SC. The S58 adaptor is on the eyepiece side and replaces the eyepiece clamp, then the backfocus is shorter - but you have no 2" clamp. This may work for photographic use but not for visual use. Please see here https://www.baader-planetarium.com/en/downloads/dl/file/id/29/product/2856/bds_sc_dimensions_technical_drawing.pdf
    Answer by: Baader Web Team (Admin) on Mar 4, 2022 11:53:00 AM
  204. Rated: 16
    1/8/2021 11:10 PM Glasspathcorrector 1:1,70 for Baader-Binoviewer with T-2 thread (MaxBright II® and MaxBright®)
    I am using the original Maxbright with a pair of 17.5 Morpheus and a 2" Everbrite Dielectric diagonal on a Celestron 8SE.
    Can you please tell me what is the exact magnification I will get when using the 1.7 GPC. Thank you

    Answer rated: -6

    Focal length of your telescope is 2000mm x 1,7 (Glaspath corrector) : 17,5mm (Focal length of your eyepiece) = roughly 194 x magnification


    Answer by: Baader Web Team (Admin) on Jan 9, 2021 5:18:00 PM
  205. Rated: 16
    7/9/2020 4:01 AM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    I want to do projection photography with the Zoom Mark IV using a Canon EOS R with and without the Hyperion-Barlow 2.25x using the 2" barrel with my telescope.

    I believe I can do this by using a Wide-T-Ring Canon R (2408336), a UFC S52 Camera-Adapter (2459119), a UFC Base (2459110), a UFC S70 / T-2 Adapter (2459130), a Baader TQC/TCR Heavy duty T-2 Quick Changing System (2459130) and a M43 / T-2 Adapter (2958080).

    What I am not sure of is exactly what UFC S70 and/or T-2 extensions I would need to get the recommended back focus for use with the full frame EOS R camera. I am also not sure if I could fit the #2459130 in the setup, it would be convenient but by no means necessary. I am also not sure if I would require different extensions when using the Barlow.

    Can you please confirm if these parts will work as I intend (with or without the #2459130), what extensions I should use to get the recommended back focus with the EOS R camera and if I need different extensions when using the Barlow?

    Answer rated: 5
    Under the link Downloads you can find our PDF according digiscopie:
    https://www.baader-planetarium.com/en/downloads/dl/file/id/444/product/3117/digiscoping_camera_adaptations_for_afocal_photography_and_eyepiece_projection.pdf
    I´d prefer to adapt the camera this way:
    https://www.baader-planetarium.com/en/baader-hyperion-t-adapter-m43i--t-2a-(m42x0.75).html
    https://www.baader-planetarium.com/en/baader-t-2--15-mm-extension-tube-(t-2-part-25a).html 2 pieces
    https://www.baader-planetarium.com/en/baader-tqctcr-heavy-duty-t-2-quick-changing-system-(t-2-part-06a-and-07).html
    https://www.baader-planetarium.com/en/baader-wide-t-ring-canon-eos-with-d52i-to-t-2-and-s52-4289.html

    And as a separate combination:
    https://www.baader-planetarium.com/en/baader-2%22-safety-kerf-nosepiece-with-2%22-filter-thread.html
    https://www.baader-planetarium.com/en/baader-ufc-s70--2%22-adapter-2%22-sc-thread-(f)-telescope-sided.html
    https://www.baader-planetarium.com/en/baader-ufc-base-(filter-chamber)-telescope-sided-s70-dovetail-receptor.html
    https://www.baader-planetarium.com/en/baader-ufc-2%22-sc-adapter-2%22-(m)-camera-sided.html
    https://www.baader-planetarium.com/en/baader-2%22-clicklock-eyepiece-clamps.html

    Then you´re able to fast change filters and eye pieces. Just take care that it needs about 60mm back focus and it doesn´t
    allow using the zoom with barlow. On the other hand, please refer the first digiscopie PDF last page that you can reach an
    enormous focal length anyway. It should´nt be neccessary using the barlow.
    Answer by: Baader Web Team (Admin) on Jul 10, 2020 2:22:00 PM
  206. Rated: 16
    1/14/2021 5:17 PM Universal Alan Gee II - Telecompressor (UAG II)
    I have a C8SE with 2" TV Everbrite Dielectric and I use the original maxbright with 2 x 17.5 Morpheus. Can you please tell me how the the UAG-II would improve my setup. What difference would I see, if any?
    I also read about the ideal distance of "121mm", by using the bino + 2" TV diagonal, what is my distance?
    Also can the UAG-II be used in conjunction with the GPC 1.7?
    Thanks for your help, I am trying to learn!

    Answer rated: 1
    The UAG II is designed for use in directly in front of the Maxbright II bino. It won´t fit well onto the old Maxbright, sorry to say. Also any 2" diagonal is not suitable in this configutation. It would be necessary to take the shortest attainable optical path - and this is the T-2 Prism diagonal.

    Sorry - we do not think it makes much sense when trying to put a 2" diagonal into the beam - most likely you won´t reach focus.

    The 112mm are equal to the light path of the bino-viewer, so that the UAG must be placed very close to the body to work. Also, the focal length of a Schmidt-Cassegrain changes, if you move the focus farther away from the telescope, so that the reducing factor changes - if you can reach focus at all.

    You can not combine the Alan Gee with a glasspath corrector - this is one of the combinations where you do not reach focus at all with a Schmidt-Cassegrai - and you would combine an element to reduce the focal length with one to extend the focal length. You are better off if you use the Alan Gee for low magnifications and a glasspath corrector for higher magnifications.
    Answer by: Baader Web Team (Admin) on Jan 18, 2021 11:11:00 AM
  207. Rated: 16
    6/15/2023 3:53 PM Baader FCCT (Filter Changer Camera Tilter) for RASA 8" and QHY cameras
    Can the FCCT II handle a QHY600 short BFL camera (not June 2023 version)? It appears to have the same bolt pattern and back focus. I understand there would be hard vignetting in the corners but this camera would allow for a square crop much bigger than the QHY268.

    Answer rated: 11
    Yes, indeed the FCCT II will also work with the QHY600M Ultra Short Version! With proper flatfields, the vignetting is manageable, but you need to set the tilt absolutely precisely on a full frame sensor to get a satisfactory result.

    The well-know astrophotographer Michael Jäger already achieved very good results with very big sensors on the RASA 8":
    https://www.baader-planetarium.com/en/blog/rasa-8-extreme-images-michael-jaeger-with-fcct-f2-highspeed-filter/
    Answer by: Baader Web Team (Admin) on Jun 16, 2023 3:06:00 PM
  208. Rated: 16
    11/30/2021 4:44 PM Hyperion Zoom 2.25x Barlow lens
    Hi, this Barlow, used direct with mirror less camera, cover full frame cmos ?

    Thanks

    Answer rated: 3
    Thanks, what is the max size that it can cover ? Aps-c?
    Answer by: Silvio Ardi on Dec 1, 2021 11:26:07 AM
    Answer rated: 1
    Unfortunately, no - this Barlow is designed for the Hyperion zoom. It does not fully cover full-frame chips.
    Answer by: Baader Web Team (Admin) on Dec 1, 2021 10:50:00 AM
  209. Rated: 16
    8/15/2019 6:36 PM 14 mm Morpheus® 76° widefield eyepiece
    I just got the Morpheus 17mm eyepiece and I would like to know if it is possible to remove the 1.25" barrel from the 2" barrel? A 2" cover was included in the box so I assume I should be able to do this. I don't want to have to keep switching my diagonals all the time.

    Answer rated: 5
    There should only be two larger covers be included, for both positions of the eyepiece cup (folded up/folded down) - quite close to two inch, but not exactly.

    The 1.25" nosepiece can't be removed without destroying the eyepiece. It is part of the optical design.

    If it should be too long for your 2" star diagonal (quite uncommon, but maybe if you have a very low-profile eyepiece clamp and a prism), then you may use a 2"/1.25" reducer. Our Pushfix # 2408151 can even be permanently mounted onto the eyepiece, its silver screw can be replaced with a headless screw.
    Answer by: Baader Web Team (Admin) on Aug 19, 2019 10:30:00 AM
  210. Rated: 16
    12/11/2022 4:18 PM Baader 6.5nm Narrowband Filter-Set – CMOS-optimized (H-alpha / O-III / S-II)
    I would like to know if these 1.25 filters fit the ZWO filter wheel

    Answer rated: -9
    Yes the filters fit in the ZWO filter wheel
    Answer by: Baader Web Team (Admin) on Dec 13, 2022 10:11:00 AM
  211. Rated: 16
    4/7/2022 11:39 AM Baader 2" Cool-Ceramic Safety Herschel Prism (Visual / Photographic)
    What is the maximum refractor diameter that can be used with the Herschel prism? Would it be safe to use a 200mm, 250mm or even more, with the right neutral density filters?

    Answer rated: -15
    We have had no problem using the Herschel for a full day at a 6"/f15 refractor, and tested it with an 8", too.
    Larger telescopes are a bit of a problem as there aren't many of them, so we can't really test it. However, we recommend take do some breaks during the observation so that everything can cool down.
    Please also note that not only aperture is a problem, but also the f/ratio - a fast telescope has got a smaller image of the sun close the the Herschel and will get hotter, while a telescope with a long focal length will produce a wider beam of light - this distributes the energy onto a larger space (so that it doesn't get too hot), but there is a higher risk that the light will not completely hit the prism when you center details at the edge of the sun for better observation. For each meter of focal length, the image of the sun is about 1 cm large, and it should fit fit completely into the 2" nosepiece ot the Herschel - which has got a free aperture of about 48mm. Otherwise, parts of the focuser may become very hot when the sun is not centered.
    So please take both focal length (diameter of the beam of light) and f/ratio into account when you think about larger telescopes.
    Answer by: Baader Web Team (Admin) on Apr 8, 2022 1:25:00 PM
  212. Rated: 16
    5/25/2017 10:41 AM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    Please, where in this focuser should my f/6.3 Celestron focal reducer (CFR) go? Currently, my imaging train would be:
    C11 --- (¿CFR?) --- BDS-SC --- (¿CRF?) --- ASI174

    Thanks,
    Martin.

    Answer rated: -10
    You need to keep the distance between corrector and camera. So, it's the best if you put it between focuser and camera.
    Answer by: Baader Web Team (Admin) on May 29, 2017 10:31:00 AM
  213. Rated: 16
    11/3/2017 4:14 AM Baader T-2 Stardiagonal (Zeiss) Prism with BBHS ® coating (T-2 part #01B)
    Does it make sense to use a T2-2" clicklock on this for a 2" eyepiece? Or it's better to just use 1.25" clickclock and eyepiece given the connection interface size is only T2.

    Answer rated: 14
    The aperture of the housing/prism is 34mm. You can use 2" eyepieces up to 34mm free aperture on
    the telescope side, these will be fully illuminated. If you have 2" eyepieces with a wider aperture than 34mm
    you will see that the field is vignetted.
    Answer by: Baader Web Team (Admin) on Nov 3, 2017 10:17:00 AM
  214. Rated: 16
    11/15/2018 9:57 PM 2" BDS-NT Baader Diamond Steeltrack® Focuser
    Can a Baader STEELTRACK Focuser fit on a CORONADO PST DOUBLE STACK?

    Answer rated: 23
    Unfortunately there is no chance to fit the Steeltrack Focuser on a Coronado PST. The focuser is way too big and too long
    Answer by: Baader Web Team (Admin) on Nov 16, 2018 8:44:00 AM
  215. Rated: 16
    6/6/2018 1:53 PM Glasspathcorrector 1:1,70 for Baader-Binoviewer with T-2 thread (MaxBright II® and MaxBright®)
    Hi, what is the difference (technical and in pratical use) between this correctors, #2456316 1.7x and #2456305 1.8x? Thank you.

    Answer rated: -3
    The 1.8x for refractors and SCTs must be inserted rather deep into the focuser, so it doesn't work with all SC-telescopes (because of the inner diameter) and refractors (if they have internal field flatteners, Petzval-elements or similar). It also requires the use of the T-2-mirror #2456100 with an optical length of 43mm to keep the correct distances.

    The 1.7x is more flexible: It can be used with other star diagonals, too, as well as behind e.g. a Herschel Wedge for solar observation. It is also mounted the same way as the 1.2x, which may be more comfortable if you work with different glass path correctors to achieve several magnifications. That's why we usually recommend the 1.7x
    Answer by: Baader Web Team (Admin) on Jun 6, 2018 3:45:00 PM
  216. Rated: 16
    8/17/2020 8:25 AM Baader Wide-T-Ring Nikon Z (for Nikon Z bajonet) with D52i to T-2 and S52
    I have a Nikon Z7, what do i need to attach this to a Celestron Edge HD 9.25

    Answer rated: 11
    We recommend
    - Celestron 48mm T-Adapter for EdgeHD 9.25”, 11”, and 14”, Item #: 93622
    - Baader Wide-T-Ring Nikon Z (for Nikon Z bajonet) with D52i to T-2 and S52 # 2408335
    - Baader Reducing piece S52 / M48 # 2958552
    The Celestron 48mm adapter has got a backfocus of 55mm; our Wide T-ring is 8.3mm thick, and the Nikon has got a flange distance of 16 mm. So, you still need an M48-extension of 30.7mm. Currently, we have got M48 Fine-Adjustment rings seperately or as set (0,3 / 0,5 / 1 mm) - # 2457915, but you'd need to get a 30mm-extension from another manufacturer.

    We could either offer you a T-2-adaptation (but there would be vignetting with a full frame sensor, so it is not recommended), or use the space for our UFC filter changer. It would fit in this gap with M48-connections, but it is of course more expensive than a simple extension tube.
    Answer by: Baader Web Team (Admin) on Aug 18, 2020 10:50:00 AM
  217. Rated: 16
    12/3/2017 6:02 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Which 2" Baader Clicklock will suit my Orion ED80 CF?

    Answer rated: 23
    We don´t sell Orion products so we don´t know how your present clamp is mounted. You can unmount your clamp to find out what size is
    given on your focuser or ask a dealer who sell this type.
    Answer by: Baader Web Team (Admin) on Dec 4, 2017 9:05:00 AM
  218. Rated: 16
    4/29/2019 8:24 PM Baader 5mm Hyperion 68° Modular Eyepiece
    I have a Zeiss Diascope 85T and would like to attach the Baader Planetarium Hyperion 5 mm 1.25" Eyepiece - HYP-5 #2454605 using the Baader Zeiss Diascope Bayonet 1.25" Eyepiece Adapter - DIA-BAYO #2454500. However, your Hyperion eyepieces application examples file (download) does not list HYP-5 as compatible with the Zeiss spotting scope with 1 1/4 inch adapter.
    From your document - Visual Observation:
    The Hyperion 21-/17-13-/8 mm eyepieces may be adapted to the Zeiss spotting scope with the aid of a bayonet-adapter #2454500.
    Can the HPY-5 also be adapted to the Zeiss Diascope 85T with 1 1/4 inch adapter (2554500)?

    Answer rated: 20
    Unfortunately, the 5mm Hyperion (and the old 3.5mm) does not work with the Zeiss Diascope. The eyepiece fits mechanically, but you can't focus to infinity.
    Answer by: Baader Web Team (Admin) on Apr 30, 2019 8:16:00 AM
  219. Rated: 16
    8/28/2020 1:38 PM Baader 2" ClickLock Diagonal Mirror
    I have a Celestron CPC 925. I have just bought the Baader 2 inch Clicklock Dialectric diagonal. Your user guide says that if I unscrew the Kerf nosepiece the diagonal has two more useful connections: An SCT thread and a S58 dovetail. However, when I try to screw the diagonal body onto my SCT it will only screw on half a turn. The threads seem to be diffferent. what am I doing wrong? How do I access the SCT thread on the diagonal?

    Answer rated: -3
    You might find the manual for our star diagonals interesting, which we have at https://www.baader-planetarium.com/en/downloads/dl/file/id/1617/product/1687/baader_star_diagonals_t_2_and_2.pdf

    The SC-thread should be easily accessible by unscrewing the nosepiece. Then you should have this part in your hands: https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/2-inch-sc-thread/baader-2%22-safety-kerf-nosepiece-with-2%22-filter-thread.html

    There are sometimes slight tolerances in the threads, so that they might not fit perfectly. Please take a look at the thread of the telescope, if there is some dirt or black colour which might block the thread. You can also try to turn the star diagonal around by removing the ClickLock as described in the manual https://www.baader-planetarium.com/en/downloads/dl/file/id/1378/product/1687/user_manual_for_baader_clicklock_diagonal_mirror_with_2_and_m68_connection.pdf on page 7.The thread is the same on both seides, but maybe one side works better.
    Answer by: Baader Web Team (Admin) on Sep 2, 2020 9:09:00 AM
  220. Rated: 16
    1/3/2018 12:57 PM Baader Tripod Adapter Flange for NexStar SE / EVO
    Will this adapter also work with Celestron CPC mount for Baader T-pod? I believe drilling is same as evo/se. Which version T-pod would work best?

    Thanks to you

    Answer rated: 1
    Yes, this flange filts on T-Pod and works with CPC mount.
    We recommend the Baader T-Pod 130
    Answer by: Baader Web Team (Admin) on Jan 4, 2018 10:46:00 AM
  221. Rated: 16
    3/10/2021 7:20 AM Baader 2" Amici-erecting-prism 90° with 2" holder and 2" sleeve
    The top of the nosepiece is has an M48-thread for 2" accessories. Inside the nosepiece, its inner diameter narrows; there is a visible inner ridge in the photos. Is this second diameter a standard size (T2 etc) and is it threaded?

    Answer rated: 12
    Inside the nose piece behind the M48 filter thread the diameter is 43mm. It is matt black painted and is made with grooves to minimize
    reflections, it is not a T2 M42 thread.
    Answer by: Baader Web Team (Admin) on Mar 10, 2021 10:41:00 AM
  222. Rated: 15
    5/17/2019 9:48 PM Baader Hyperion 68° Eyepiece Set (Starter)
    The recommended distance from the m43 thread on the eyepiece to the sensor on a APS-C DSLR camera is T-Adapter(7.5mm) + 30mm extension + T2-ring(55mm flange-back). By using a 40mm extension instead of a 30mm I get more magnification, but what's most important when doing photography is to minimize the abberations/lense errors as much as possible. Which distance is best for this? 40mm extension or 30 mm extenion?

    Answer rated: 1
    This is an empiric value. You need 40mm of distance to get rid of the distortions at the edges with a full-frame-camera; for APS-C, 30mm are sufficient.

    We did not notice obvious influences on the image quality by increasing the distance/magnifications, only the exposure times get longer when you increase the distance. Of course, if you are close to the resolution limits of the optical system, too much magnification is not helpful, but but as long as you don't exceed the resolution power of your telescope, it should not matter whether you use 30 or 40mm with APS-C.
    Answer by: Baader Web Team (Admin) on May 20, 2019 8:26:00 AM
  223. Rated: 15
    1/15/2020 3:28 PM Baader MaxBright® II Binoviewer with case
    Do I need any additional accessory, that is not included in "MaxBright II Binoviewer with case", to use it with the Stellarvue 90 f7 Raptor Triplet Refractor? Thanks

    Answer rated: 1
    The MaxBright II has two front-connection options:
    1. A female T-2 thread to adapt onto most common photographic equipment
    2. A Zeiss ring-dovetail as it has been established by Carl Zeiss for more than 50 years.

    We will soon publish an extensive manual that shows the multitude of accessories that we recommend to combine with the MB II in order to adapt this onto most every telescope with the shortest possible optical length.

    We cannot equip the MB II with the star diagonal that you certainly would need with your refractor in order to have a convenient way of looking through the telescope, because all users of Newtonian telescopes could not make use of this star diagonal. Accordingly it will be a matter of the customer or the dealer to help finding the appropriate adapters or star diagonals for the telescope in question and most of all, to enable this adaptation without wasting precious backfocus. This is the reason why we have developed a multitude of T-2 prism star diagonals with T-2 threads on both sides. Because you could choose for your refractor whether you want to use a 2" nosepiece to put it in front of the star diagonal or whether you opt for a 1.25" nosepiece.

    So please have a bit more patience until we publish the MB II manual and check our website for star diagonals. Because furthermore we are preparing an extensive document to explain all the differences and benefits of our various star diagonals in exhausted detail, this will also be published within the next month.
    Answer by: Baader Web Team (Admin) on Jan 20, 2020 4:46:00 PM
  224. Rated: 15
    1/15/2019 11:49 PM 2" BDS-NT Baader Diamond Steeltrack® Focuser
    Would it be possible to fit this to a Skywatcher 130 PDS?

    Answer rated: -20
    We do not know the positions of the bore holes of all Newtonians, but please take a look at the technical drawing of the Versa Base which you can find in the Download-section of the product page of the Steeltrack, or directly at https://www.baader-planetarium.com/de/downloads/dl/file/id/30/product/2859/bds_nt_dimensions_technical_drawing.pdf

    If the holes fit, you can simply replace your focuser with the SteelTrack for Newtonians. Please note that the Steeltrack is designed for tubes with 20cm diameter or larger; for smaller tubes, you need additional spacers (#2957235).
    Answer by: Baader Web Team (Admin) on Jan 16, 2019 9:53:00 AM
  225. Rated: 15
    12/17/2020 10:45 AM Andor sCMOS range: Balor, Marana and ZL41 cameras for Physics & Astronomy
    Have they updated their cameras to be compatible with already existing software or are they still requiring you to use their proprietary software?

    Answer rated: -20
    Information on the required software can be found on the spec sheets of the cameras. There you can see that Andor offers

    i) Andor SOLIS for imaging (our own software for data acquisition and processing)

    ii) Andor SDK and Andor SDK3 – which is a software development kit that allows you to control the Andor camera from your own application. Available as 64-bit libraries for Windows (8, 8.1 and 10) and Linux. Compatible with C/C++, LabView and Matlab (Python also possible).

    Andor also offer drivers to use the camera with third party software like MaximDL. They are currently updating our “Third party software support” website.
    Answer by: Baader Web Team (Admin) on Dec 17, 2020 10:48:00 AM
  226. Rated: 15
    6/11/2020 3:49 PM Baader 2" Cool-Ceramic Safety Herschel Prism (Visual / Photographic)
    The documentation states that the Solar Continuum filter can be removed when using a fully apochromatic APO refractor*. What is implied is that a 1.8 ND filter should be substituted when doing visual observing – with of course the 3.0 ND filter still being in place. Please confirm.

    If this is the case, please also clarify if the 1.8 ND filter should be placed where the Continuum filter was with the 3.0 ND behind it closest to the eye piece, the other way around with the 3.0 ND closest to the prism with the 1.8 ND closest to the eye piece, or whether it makes no difference.

    *The documentation specifically mentions Astro Physics, TEC, and Zeiss. I am using a Tele Vue-85 which claims APO performance.

    Answer rated: 11
    We do not comment on the APO-status of the TV-85, but we confirm that visual and imaging results will show solar surface details in better sharpness when keeping the continuum filter in the light path.

    To be straight! The Herschel wedge warrants for a safe solar viewing experience, with only the ND 3.0 filter in place! However, the photopic reception of brightness is very different for different eyes (and related to age as well!).

    When adding a solar continuum filter, the user has the same amount of transmission reaching the eye as without such a filter - but only within a 10 nm wide part of the spectrum at 540 nm. For this reason the "overall brighness" is perceived as being less. But if the Herschel wedge (w. ND 3.0 filter in place) were transmitting a dangerous amount of energy - even the small 10 nm "window" would constitute a "danger".

    So for a 99.9 % majority of people it is not "necessary" from the aspect of safety, to add another ND -filter on top of the necessary ND 3.0 filter. But - a small number of people do inherit raised sensitivity for brightness, leading to eventual phototoxic reactions in the eye during prolonged and repeated exposure to light levels that would be perceived as normal by others.

    Effects of phototoxic overreaction have been exhaustively investigated for the new generation of LED and CREE light sources which can compete in their radiation intensity with solar brightness in the meantime - when stared into at close distance. So the same precautions as valid for direct intensive LED illumination must be observed for Herschel-wedge operation just as well.

    Fortunately most people have a "built in" aversive-reaction, to avoid excessive amounts of light falling onto the retina. So everyone observing the sun should be attentive to constantly observe his own "comfort feeling". If the visual brightness is experienced as causing strain on the eye, or an "afterglow-experience" will remain for some time when lifting the eye from the eyepiece, - in these cases a further added 0.9 ND filter will largely help to have a comfortable seeing experience. Adding a 1.8 ND filter though onto the 3.0 ND-filter will dim the solar image to a degree that fine solar details become invisible (unnecessarily).

    Do test the Herschel brightness experience in good faith for a few seconds with only the ND 3.0 filter in place (always!). Depending on your age then maybe add a 0.9 ND- or even 0.6 ND-filter, until the image brightness is perceived as comfortable even at viewing sessions of up to 3 minutes. After each 3 minutes a short pause is mandatory, to check for any "afterglow"- effects, for dizzyness or for impaired vision. This is because brightness strain on the eye can bring out hidden retina damages or very early retina dislocation that went unnoticed before.

    Only for imaging purposes, the ND 3.0 filter may be taken off the light path and replaced with one of the photographic ND-filters (0.6/0.9 or 1.8 ND) - so as to arrange brightness in a way that the shortest available camera exposure time can be made use of.
    Answer by: Baader Web Team (Admin) on Jun 15, 2020 2:42:00 PM
  227. Rated: 15
    6/16/2020 4:08 AM Mark V Großfeld (Giant)-Binocular
    What are the recommended accessories for using Mark V with a Celestron 9.25?

    Answer rated: 8
    We have described several adaptations in the manual which you can find in the download section of the MaxBright Binonoviewers website. For an SC, you basically only need a nosepiece. We also recommend a Glasspath Corrector 1.25x, although it is not absolutely necessary - but at higher magnifications, it removes the colour aberrations which may be visible even at an f/10 telescope.
    You can find sets with nosepiece and GPC here:
    https://www.baader-planetarium.com/en/accessories/optical-accessories/bino-viewer/maxbright-ii-sets.html

    Please make sure that you have a sturdy eyepiece clamp. For a compact adaptation, we also recommend a TZ-2 star diagonal which can be attached directly to the binoviewer, but reaching focus is no problem with a Schmidt-Cassegrain.
    Answer by: Baader Web Team (Admin) on Jun 16, 2020 10:41:00 AM
  228. Rated: 15
    3/19/2021 1:04 PM H-alpha 0.7x Telecompressor 2" for Solar Spectrum
    Can the 0.7x and 0.4x solar telecompressors be used for calcium k line imaging?

    Answer rated: -5
    The 0,7x will be suitable for CaK for sure. We have not yet tried with the 0,4x but it should be possible. Please note that these reducers need to be attached on the rear end of the filter. That means they do not show a larger area of the sun than without reducer (the Halpha or CaK filter aperture/diameter is the limiting factor) but make the given image smaller so that it fits on a small CCD or CMOS sensor. Therefore we can only recommend these reducers for photorgraphy.
    Answer by: Baader Web Team (Admin) on Mar 19, 2021 2:41:00 PM
  229. Rated: 15
    3/23/2021 6:38 PM Baader Standard Base - for MQR III & IV & for V-Bracket, and for all Vixen-style finderscope mount bases
    I have 4mm holes in tube 36mm apart, I think this works for hole spacing 27-45? My problem could be the distance of hole centres from tube flange, it is 18mm clearance behind. So, what is front to back length of the base? I have an old clamp that's 35mm, it fits only just by fraction of millimeter!
    Thanks.

    Answer rated: 13
    The distance of the holes fits, no problem.
    The length of the clamp is 36mm, with the holes exactly in the middle.
    Answer by: Baader Web Team (Admin) on Mar 24, 2021 12:12:00 PM
  230. Rated: 15
    11/1/2021 9:52 AM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    Hi, I can used it for mak 150?

    Answer rated: 0
    A Sky-Watcher Maksutow 150 for example is build with a 2" thread so you can directly screw on the Steeltrack SC. Just check before because the
    diameter of the focuser is 95mm that you not collide with the original focus knob.
    Answer by: Baader Web Team (Admin) on Nov 2, 2021 10:28:00 AM
  231. Rated: 15
    1/26/2019 1:20 PM Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
    What is the best diagonal for a F10 SCT (Celestron 9.25 Evolution):
    Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
    Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp
    If a focal Reducer/Corrector f/6.3 is used does the recomended diagonal change?
    Thanks

    Answer rated: 18
    We can't give a simple answer to this question. Especially at a system with f/10, there is not too much difference between prism and mirror, as the prism doesn't introduce noticable colour; behind a reducer (and at faster systems), the mirror is in an advantage.

    Please note that a reducer requires the correct distance; usually it is better to use an eyepiece with a longer focal length instead of a reducer, especially as a reducer can't enlargen the largest possible field of view, as the fov is still limited by the diameter of the eyepiece holder/internal tubes.

    Both prisms and mirrors can deliver very good results, and the BBHS are high-end versions. There is a very extensive comparison between mirrors and prisms, although unfortunately the BBHS weren't available yet when it was performed. You can find it at
    https://www.baader-planetarium.com/de/downloads/dl/file/id/160/product/2872/testreview_mirror_vs_dielectric_vs_prism_diagonal_comparison_w_paolini.pdf
    Answer by: Baader Web Team (Admin) on Jan 28, 2019 8:37:00 AM
  232. Rated: 15
    10/28/2019 2:59 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Do u know which baader adapter fits my Meade 6000 115mm APO triplet refractor?

    Answer rated: 44
    We do not have the specifications for all telescopes available on the market. If there is enough back focus, you can always insert one of the 2"-extensions #2956237 37mm ClickLock extension or #2956247 47mm ClickLock extension into your existing eyepiece clamp.

    Otherwise, we need the specifications of your telescope - does it provide a thread or a dovetail, and can you unscrew your existing clamp? Then you can measure the thread as described here: https://www.baader-planetarium.com/en/blog/clicklock-clamp-for-your-telescope/ Chances are good that we already have a ClickLock with the matching thread.
    Answer by: Baader Web Team (Admin) on Oct 28, 2019 9:31:00 AM
  233. Rated: 15
    3/19/2018 6:15 PM Alan Gee Telecompressor Mark II (T-2 part #20)
    I would like to use the Alan Gee Telecompressor Mark II with my Celestron 9.25" SCT regular XLT Coatings version (not Edge version). I also have a Baader Planetarium 2 inch Clicklock Mirror Diagonal. Can I use this configuration for visual use? What kind of adapters do I need?

    Also, If I want to use the Alan Gee telecompressor for Prime photography using Barlows / Eyepiece Projection, do I need to get additional adapters?

    Thanks!

    Answer rated: 11
    You have several options to use the Alan Gee for visual use; it shoud be mounted ca. 121mm in front of camera sensor or field stop. That's the ideal distance, but it doesn't have to be reached perfectly.

    We have described them in the manual at https://www.baader-planetarium.com/en/downloads/dl/file/id/213/product/1197/baader_alan_gee_ii_telecompresor_shapley_lens_f_5_9_manual_and_applications.pdf

    To use it with any of our 2" star diagonals, you need (as shown in Fig. 3 on page 2 of the manual) to remove the 2"-nosepiece from the mirror and replace it with
    1) Baader Expansion Ring 2"a/T-2i with 1mm optical path length (T-2 part #28) # 2958242
    2) the Alan Gee (you may have to remove the two extension tubes to achieve the best distance. The 2" Clicklock mirros has got an optical length of 112mm, so you probably have to remove both)
    3) either
    3a) Baader 2" / T-2 Nose Piece and Camera adapter (same as used by SBIG) (T-2 part #16) #2408150 if you want to insert the star diagonal into a 2" eyepiece holder or
    3b) Baader T Adapter (BTA) for SC and MAK Telescopes (T-2 part #21) # 2408160 if you want to screw it directly onto your C9 1/4.

    If you want to insert the Alan Gee into the telescope itself, you need the Centering ring for Alan Gee II Telecompressor # 2454410 (for C9 1/4), then you can lock it in its position with the standard visual back of your telescope.

    I would not recommend combining the Alan Gee with a Barlow lens - you would use one optical element to shorten the focal length and then another one to extend it again. You'd be better of if you use instead one Barlow and adapt its magnification. The Q-Barlow 2.25x / 1.3x # 2956185 e.g. is designed for 1.3x or 2.25x, depending on where it is mounted, and the VIP 2x modular barlow lens, visual and photographic # 2406101 is designed for magnifications of 2x and more, depending on the distance. For calculating the different Magnifications with the VIP-Barlow, please check this PDF: https://www.baader-planetarium.com/en/downloads/dl/file/id/240/product/1062/calculating_different_magnifications_with_the_vip_barlow.pdf
    Answer by: Baader Web Team (Admin) on Mar 21, 2018 12:22:00 PM
  234. Rated: 15
    4/8/2018 3:29 AM Baader 2" ClickLock Diagonal Mirror
    How secure is the nosepiece when coupled to the diagonal body? Is there any risk of it loosening when subjected to heavy loads with the diagonal oriented horizontally?

    Answer rated: -3
    The nosepiece is extremely secure and is able to hold even very heavy payload. We've tested it with a C14, see here: https://www.baader-planetarium.com/media/wysiwyg/gross_BP28-AB2956100-06-ClickLockDiagonal-2inch.jpg (but this is not recommended for imitation).

    Also we recommend to check out this Youtube Review: https://youtu.be/oYoymtIT0ww
    Answer by: Baader Web Team (Admin) on Apr 9, 2018 9:25:00 AM
  235. Rated: 15
    8/26/2021 9:10 PM Baader Machine-Grease #1 Teflon-Brown (-15°C–+55°C)
    Currently I own a Vixen GP-DX SkySensor 2000PC mount (+25 years old). with good polar, 3-star alignment and a DSO not to low in the sky I'm able to shoot DSO's with pin point stars with an exposure time between 1 and 2 minutes carrying a Takahashi TSA-102. Nevertheless, it needs re-greasing because the last year the mount moves stiffer and stiffer and exposure times are decreasing. My question is which type of grease will best fit my old mount the Teflon-Brown or the Teflon-White. what grease would you recommend?

    With kind regards,
    Ronald Bemelmans

    Answer rated: 16
    Teflon white will be the right choice for you https://www.baader-planetarium.com/en/baader-machine-grease-2-teflon-white-(-25%C2%B0c%E2%80%9340%C2%B0c).html
    Answer by: Baader Web Team (Admin) on Aug 27, 2021 8:59:00 AM
  236. Rated: 15
    2/6/2021 10:22 PM Filter cell 2" classic (8mm height)
    To be clear, what is the total height (8mm??) of the filter, vs the height without the male threads?

    Answer rated: 5
    The visible rim of the flter cell (when it is mounted into an eyepiece) is 8mm, the thread is an additional 2mm, so total height of the filter cell when placed on a table is 10mm.
    Answer by: Baader Web Team (Admin) on Feb 8, 2021 10:33:00 AM
  237. Rated: 15
    9/14/2022 2:19 PM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    Is it compatible with Celestron TrailSeeker 80 with eyepiece at 45 degrees? Thanks in advance.

    Answer rated: 11
    Yes it is compatible.
    Answer by: Baader Web Team (Admin) on Sep 14, 2022 4:09:00 PM
  238. Rated: 15
    9/23/2022 10:29 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I would like to get a 50mm long 2" extension that that has the Clicklock groove on the female side and M48 threads on the other end. This would fit between my EDGEHD 8 reducer and Canon RP T ring setup. Who has the grooved extension?

    Answer rated: -11
    Unfortunately, we do not have such an adapter - we are sorry.
    Answer by: Baader Web Team (Admin) on Oct 11, 2022 12:23:00 PM
  239. Rated: 15
    12/4/2017 7:27 AM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    I'd like to use the mpcc mk3 with this eyepiece. Where is the field stop located?

    Answer rated: -12
    Please see following link: http://www.baader-planetarium.com/en/downloads/dl/file/id/357/product/3117/hyperion_universal_zoom_mark_iv_specifications_drawing_and_technical_data.pdf
    Please mention the reference surface which is the determining factor.
    Answer by: Baader Web Team (Admin) on Dec 4, 2017 8:01:00 AM
  240. Rated: 15
    8/21/2020 8:54 AM Baader double-balancing plate-set with 3" plate, V-clamp and Stronghold
    Great to know that it can be fittted on a tripod.Can a camera plate like Manfrotto with 3/8 sliding screw be fitted on the center of the plate with the anti rotation lug in one of the holes.? That way the balancing plate can be mounted of a photo video mount for complete movement with two scopes mounted

    Answer rated: 13
    Probably not without some work, but we do not know the measurements of Manfrotto.
    But you may have to remove at least the pin from the plate.
    Answer by: Baader Web Team (Admin) on Sep 9, 2020 1:56:00 PM
  241. Rated: 15
    5/1/2020 11:03 AM 2" BDS-NT Baader Diamond Steeltrack® Focuser
    Please advise the output shaft diameter (mm) for both sides of the focuser knobs. One shaft is connected to the black colored knob, and the opposite side shaft is connected to the gold colored knob. I can't find the shaft diameters in any of the drawings.
    Thank you

    Answer rated: -2
    At the left side under the black knob the axis has a diameter of 7mm and a machined flat 1mm deep. At the right side under the brass knob the
    diameter is 2,5mm and the machined flat is 0,1mm deep.
    Answer by: Baader Web Team (Admin) on May 8, 2020 10:44:00 AM
  242. Rated: 15
    1/27/2022 10:47 AM Baader f/2 Highspeed-Filters (H-alpha, O-III, S-II)
    what is the filter thickness of your 2" F/2 high speed narrowband filters say Item 2459399?

    thanks

    Answer rated: -15
    The filter thickness is 2mm. You find such informations when you scoll down the product page (after you selected the filter size) and then you see a tab "specifications"
    Answer by: Baader Web Team (Admin) on Jan 27, 2022 11:14:00 AM
  243. Rated: 15
    6/5/2020 5:51 PM Baader MaxBright® II Binoviewer with case
    Can this be used for terrestrial viewing using an 8" SCT? Will the image be upright / mirror imaged / upside down?

    Answer rated: -1
    The binoviewer itself does not change the orientation of the image from telescope. In another words you´ll have the same image with or without it when using an eye pice. Therefore we recommend an amici prism for terrestrical view:
    https://www.baader-planetarium.com/en/catalogsearch/result/?q=amici&___from_store=de
    Answer by: Baader Web Team (Admin) on Jun 8, 2020 2:52:00 PM
  244. Rated: 14
    10/24/2019 5:54 PM Baader UFC 2" FLI Camera-Adapter (optical height: 10 mm)
    Do you have any image about of setup FLI PL 16803 adapter and UFC base for RASA 11"? Regards

    Answer rated: -10
    In the download section of the UFC product page you find a pdf from Christoph Kaltseis about UFC and RASA image train. Its in German but has many photos https://www.baader-planetarium.com/en/downloads/dl/file/id/351/product/3081/rasa_11_und_ufc_celestron_image_train.pdf
    Answer by: Baader Web Team (Admin) on Oct 25, 2019 3:04:00 PM
  245. Rated: 14
    5/31/2019 9:33 AM Baader O-III Filter (10nm) visual
    Hi Is this for 'visual' use only or can it be used with a modified DSLR? I already an Ostara O III 'visual' filter but it yields very bright background. I've tried using with IR cut filter but to no avail. Many thanks Steve H

    Answer rated: -6
    We cannot say if there will be more constrast with this filter than with the competiting filter because we have not tested their filter. Generally our visual OIII filter can be used with DSLR but even an modified DSLR is not a good camera for narrowband (OIII) photos. Only every 4th pixel is sensitive for this wavelength. You loose 3/4 of the resolution of the sensor wich makes the photo weak and unsharp.
    Answer by: Baader Web Team (Admin) on Jun 3, 2019 2:04:00 PM
  246. Rated: 14
    1/31/2018 10:21 PM 2" BDS-NT Baader Diamond Steeltrack® Focuser
    Is there a unit suitable for a Celestron CPC 9.25"? the one in description says newtonian. Thanks

    Answer rated: 10
    The CPC 9.25" is a Schmidt-Cassegrain telescope. So you will need the BDS-SC Steeltrack:
    https://www.baader-planetarium.com/en/2%22-bds-sc-baader-diamond-steeltrack.html
    Answer by: Tobias Baader (Admin) on Feb 1, 2018 8:39:00 AM
  247. Rated: 14
    10/25/2022 4:04 PM QHY Color Filter Wheel (CFW 3)
    Can I use with that qhycwf3 color filter wheel, others tipes of photometric filters, like jhonson Cousin ? Thanks

    Answer rated: -1
    Yes this is possible if you choose the correct filter size. We do supply Besselfilters (= Johnson Cousins) in 1 1/4", 31mm 36 ,, 2", asf.: https://www.baader-planetarium.com/de/ubvri-bessel-filtersatz-%E2%80%93-photometrisch.html
    Answer by: Baader Web Team (Admin) on Oct 26, 2022 9:07:00 AM
  248. Rated: 14
    12/23/2020 2:37 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I have a Celestron Nexstar Nevolution 9.25. What click lock works with it?

    Answer rated: 9
    You need #2956220 SC / HD (2")-Clicklock (5" SC, 6" SC/HD, 8" SC/HD and 9¼" SC) for a regular Schmidt-Cassegrain.
    Answer by: Baader Web Team (Admin) on Dec 29, 2020 10:49:00 AM
  249. Rated: 14
    9/29/2020 11:37 PM 2" BDS-NT Baader Diamond Steeltrack® Focuser
    Hello, I have this focuser, is there any plan to build a focuser riser? I use my scope with 2 different coma correctors. One shifts original focus 35mm outward, and other one shifts original focus 15mm inward. To achieve focus with relative same drawtube position i need 50mm and move mirror but have only 30mm because of tube dimensions and need to lengthen optical path by additional 20mm. For example Feathertouch focuser and old Steeltrack have risers available and some of us would appreciate the same thing here. Thanks in advance.

    Answer rated: -5
    We are sorry- such a product is not in our planning for forseeable time.
    Answer by: Baader Web Team (Admin) on Oct 5, 2020 8:02:00 AM
  250. Rated: 14
    9/21/2017 2:57 AM Hyperion Zoom 2.25x Barlow lens
    Can I use this kit with my Brandon Vernonscope 80mm apochromatic F6 480mm focal length?
    Thank you!

    Answer rated: -21
    The Hyperion Zoom Barlow lens will work perfectly with your Brandon Vernonscope.
    But you need the ClickLock 1,25" clamp to use it with your 1,25" eyepieces, please see this graphic
    http://assets.baader-planetarium.com/media/extendware/ewimageopt/media/inline/d9/5/hyperion-zoom-225x-barlow-lens-cd3.jpg
    Answer by: Tobias Baader (Admin) on Sep 26, 2017 4:46:00 PM
  251. Rated: 14
    7/10/2020 10:51 AM 2" BDS-RT Baader Diamond Steeltrack Focuser
    Is there an 2" BDS-RT Baader Diamond Steeltrack Focuser Adapter for Explore Scientific ED APO with a 54mm 0,75 outer thread? (I have a clicklock 54i that is the fitting Im looking for also for the focus adapter). If not, I’d like to put that up on the wishlist.

    Answer rated: 8
    So far we had no plans to produce such an adapter, you're the first to request this. We will keep this in the "wishlist" but can't guarantee anything.
    Answer by: Baader Web Team (Admin) on Jul 20, 2020 2:09:00 PM
  252. Rated: 14
    9/25/2017 10:44 AM RCC I, Rowe Coma Corrector
    Please can you explain the differences between this and RCC and MPCC correctors?

    Answer rated: 8
    Both MPCC III and RCC offer a similar quality (with the RCC being maybe a little bit better than the MPCC Mark III), but the MPCC is designed to work out of the box with a DSLR (that is, 55mm with a T-2-adaptation), while the RCC provides much more backfocus for e.g. a filter wheel or the RCC Off-Axis Guider. So, if you need more space for accessories, then the RCC is the right choice. If you either wan't to adapt only camera, or if you also want to use eyepieces, the MPCC III is better suited.
    Answer by: Baader Web Team (Admin) on Sep 25, 2017 11:26:00 AM
  253. Rated: 14
    3/8/2020 4:43 AM Baader H-alpha 7nm CCD Narrowband-Filter
    I would like to install your 2" H-alpha 7 nm filter in an Astromechanics lens adapter/controller. However, the threads are located at the back of the adapter, and this means that the filter would thread in with the threads on the lens side, and the filter body facing the camera. I think that this is backwards from the way that the filter would be mounted in a typical filter wheel. I think that the orientation should be immaterial, but is that true? Thank you.

    Answer rated: 15
    It shouldn't make any difference, but we always recommend that the more shiny side of the filter faces away from the camera to avoid reflections.
    Answer by: Baader Web Team (Admin) on Mar 11, 2020 10:28:00 AM
  254. Rated: 14
    10/15/2020 2:35 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    What 2" Clicklock for Takahashi 76DS ? Sky90 focuser.?

    Answer rated: 8
    Please check out our 2" ClickLock M64a clamp (Takahashi) #2956264
    https://www.baader-planetarium.com/en/baader-2%22-clicklock-eyepiece-clamps.html#574=938
    Answer by: Baader Web Team (Admin) on Oct 15, 2020 7:44:00 AM
  255. Rated: 14
    1/17/2021 6:05 AM Baader 31mm Hyperion Aspheric 2" Eyepiece
    Will the Hyperion 31mm eyepiece be useful with my dobsonian 16" f/4,5 reflector? How much edge of field distortion will there be?

    Answer rated: -3
    Of course you can use the Hyperion eyepieces with the telescope, but will show the coma which is typical for such a fast telescope (just like a camera would di, too). To get rid of the coma, we recommend combining your eyepieces with the 2" MPCC V-1 Mark III Newton Coma Correktor - SET: Visual and Photographic Version # 2458403 which can easily be combined with many eyepieces. This coma corrector neither changes the focal length nor the field of view.

    Please note that the 36mm eyepiece will result in an exit pupil of 8mm with your telescope, which is probably too much for your eyes (typically, the human pupil doesn't open much farther than 7mm even for young people and under darkest skies). The 31mm eyepiece should be more useful with an exit pupil of ca. 6.9mm.
    Answer by: Baader Web Team (Admin) on Jan 18, 2021 9:39:00 AM
  256. Rated: 14
    11/14/2016 7:22 PM Baader UV/IR Cut / L-Filter
    Is my L-filter defective? The image is brighter/dimmer than with e.g. the R-filter?

    Answer rated: -19
    It is normal that the F-filter delivers a much brighter image when used with the same camera settings. There probably was a filter mismatch, e.g. because a filter is in the wrong position in the filter wheel or was confused with another filter in the darkness at the telescope. Take a look at the filters: The L-filter should appear like glass, R, G and B should show a darker red, green or blue image.
    If this is okay, please check the software you use for colour combination, and perhaps try another software.
    Answer by: Baader Web Team (Admin) on Nov 15, 2016 9:38:00 AM
  257. Rated: 14
    3/7/2019 3:08 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    How long is the nose piece (the part that inserts into the focuser tube) on the 37mm extension (2956237)?
    I have the 47mm extension and the nose piece is 27mm on that one...is it the same?

    Answer rated: 24
    In deed the nose pieces are different. The length of the 37mm version is ca. 24mm.
    Answer by: Baader Web Team (Admin) on Mar 8, 2019 11:56:00 AM
  258. Rated: 14
    12/3/2021 6:57 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Re 2956256
    Will this one work on SkyWatch EvoStar ED80? Any foreseeable limitations it may introduce?

    Answer rated: 6
    Unfortunately we cannot say this because we do not have the EvoStar ED 80 here to try out. We do not know if you come in focus with your mirror/eyepiece combination. You can easily find out by yourself. Here is a graphic that shows how much backfocus the clamps require and if you have that much focus travel then it will work https://www.baader-planetarium.com/en/downloads/dl/file/id/408/product/3030/baader_2_clicklock_system.pdf
    Answer by: Baader Web Team (Admin) on Dec 3, 2021 8:35:00 AM
  259. Rated: 14
    8/16/2021 7:50 PM Baader Tripod Adapter Flange for NexStar SE / EVO
    Is this adapter compatible with Avalon T-pod 110?

    Answer rated: 3
    It will only fit on Baader T-Pod,https://www.baader-planetarium.com/en/accessories/mount-accessories/tripods-pillars/baader-t-pod-aluminium-tripod-95-130cm.html not on the Avalon T-Pod
    Answer by: Baader Web Team (Admin) on Aug 17, 2021 9:24:00 AM
  260. Rated: 14
    8/23/2019 6:55 AM Baader 2" Cool-Ceramic Safety Herschel Prism (Visual / Photographic)
    Is this prism safe to use with a TeleVue NP127is refractor, which is a Nagler-Petzval design. In addition to the first objective doublet lenses, this has a second doublet at the focuser end of the OTA. Thank you.

    Answer rated: 6
    We do not sell TeleVue-telescopes and are not sure about the design of the lenses.
    So we'd have to ask you to check the manual or consult your TeleVue-dealer. If the telescope can be used for projecting the sun, it can also be used with a Herschel wedge.
    Answer by: Baader Web Team (Admin) on Aug 26, 2019 10:20:00 AM
  261. Rated: 14
    5/12/2021 11:51 AM Baader Solar Continuum Filter (540nm)
    I have bought this filter but not yet tried it. Soon I will do imaging of the sun with my Celestron Neximage 5 + APO 2x Barlow and my OTA, Celestron C8" XLT.
    I have also bought your AstroSolar Safety Film and will use it in front of the C8".
    Is this enough for imaging of the sun or will it be too warm and harm my equipment?
    Friends of mine have said that it is also needed to add an extra IR filter to reduce the heat, but this is something I haven't read from you in Baader. Maybe it's some amateur's ideas without the correct knowledge.
    I have bought many things from you and think you are one of the best optic manufacturers in the world. I really trust your skills and your products.
    So before I start imaging the sun, it's better to ask you for good advice instead of destroying my equipment. :-)
    Regards,
    Bo Sundin aus Schweden

    Answer rated: -2
    Thanks for your kind words. We can confirm that AstroSolar Safety Film (OD 5.0) in FRONT of your optics is suitable of protecting your instruments and eyes. No need for an additional IR-filter. Please also check out www.astrosolar.com for more informational pages as well as FAQs.
    Answer by: Baader Web Team (Admin) on May 12, 2021 12:10:00 PM
  262. Rated: 14
    11/8/2020 10:18 PM Baader 2" Four-in-One Adapter M68 (Zeiss) / 2.7" (A.P.) / M60 (Vixen) / M56 (Synta)
    i need an adapter for a Vixen ED103S. I would like the adapter to screw 0nto the the M60 female thread on the focal reducer, and reduce down to a threaded M48 ort M42 male thread for connecting the imager - all threaded connercvtions if possible.
    haver anything?

    Answer rated: 0
    Please check out our T-2 Four-in-One Adapter #2458225:
    https://www.baader-planetarium.com/en/baader-four-in-one-adapter-m68t-2m68.html

    This adapter has a M60a male thread on one side and a T-2 male thread on the other side, see application images. If you prefer M48, you could purchase additionally the M68a to M48a Adapter #2458229
    https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/m48-adapter-system/m68a-to-m48a-reducing-ring.html
    Answer by: Baader Web Team (Admin) on Nov 9, 2020 9:26:00 AM
  263. Rated: 14
    4/28/2022 1:44 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Does the model #2956220 SC / HD (2")-Clicklock (5" SC, 6" SC/HD, 8" SC/HD and 9¼" SC) fit a Celestron CPC 9,25 OTA? Thanks...

    Answer rated: -6
    The CPC 925 contains a normal SC 925. So yes, this fits.
    Answer by: Baader Web Team (Admin) on Apr 28, 2022 9:30:00 AM
  264. Rated: 14
    5/21/2021 4:08 PM Baader K-Line Filter 1¼" (double stacked)
    Can this filter be used for photography with a glass white light solar filter instead of the included film?

    Answer rated: 0
    If its an approved withe light solar filter it will work but please note depending on the neutral density of this filter the image may be quite dark
    Answer by: Baader Web Team (Admin) on May 21, 2021 4:53:00 PM
  265. Rated: 14
    10/1/2022 12:00 AM Eudiascopic ED eyepiece 35 mm - 1¼"
    Can you tell me how much eye relief they have?

    Cheers!

    Answer rated: 5
    The eye relief is ca. 30mm.
    Answer by: Baader Web Team (Admin) on Oct 4, 2022 11:19:00 AM
  266. Rated: 14
    7/20/2017 3:01 PM
    I wonder if your item no. 2451530, the v Dovetail clamp 70 mm, is similar to the Nexstar clamp, once made by you and sold by Alpine Astro, in short, will it fit my Nexstar GT mount or do you selle anything else that will? Thank you very much for you answer.
    Best Regards, Lars Bruhn

    Answer rated: -38
    Yes, this is indeed the same clamp and will fit your NexStar GT.
    Answer by: Tobias Baader (Admin) on Jul 21, 2017 4:48:00 PM
  267. Rated: 14
    11/30/2020 4:37 PM Baader T-2 / 15 mm Extension Tube (T-2 part #25A)
    I would like to experiment ep projection with my Morpheus eps and an APS-C Mirrorless camera with T2 adapter mounted on the camera flange. Is the recommended extension tube still 30mm, even if the Mirrorless camera backfocus is 17,7mm instead of the 44-46,5mm of a typical DSLR? Or is it lower (15mm, even less?) I am wondering if I should buy just the M43-T2 adapter or also the extension tube. And a 7.5mm M43 extension is already provided with Morpheus EPs

    Answer rated: 29
    The 30mm extension for APS-C is calculated for a DSLR with an additional backfocus of 55mm incl. T-2-adapter. You get this distance with T-Rings which provide the standard T-2-distance of 55mm which is required by old camera lenses with T-thread.
    Our MFT-T-ring provides both: The standard distance of 55mm, or a shorter adaptation when you remove the extension.
    For an APS-C, you should have approximately 55+30=85mm between the T-thread at the eyepiece and the camera sensor, otherwise there will be distortions or vignetting. This is not an exact distance, but a rule of thumb. With a wide-angle eyepiece, you get get closer to the sensor than e.g. with a Plössl or Ortho.
    Answer by: Baader Web Team (Admin) on Dec 1, 2020 10:28:00 AM
  268. Rated: 14
    6/3/2020 10:34 AM Baader 2" to 1¼" ClickLock Reducer (T-2 part #15B)
    I also have a Celestron Evolution HD 8 telescope. My diagonal is 1.25 inches. Can I install the 2 inch Clicklock as the telescope’s new visual back, immediately followed by the 2 to 1.25 inch Clicklock Reducer, then my 1.25 inch diagonal (regular non-Baader)?

    Answer rated: -12
    Yes, no problem - all standard 2" accessories fit into the 2" ClickLock, and all 1.25" accessorieries fit into the 2"/1.25" reducer.
    Answer by: Baader Web Team (Admin) on Jun 3, 2020 10:39:00 AM
  269. Rated: 14
    10/9/2021 5:11 PM Bundle: Hyperion Universal Zoom Mark IV with Hyperion-Barlow 2.25x (8-24mm / 3.6-10.7mm)
    I have the Zoom Mark IV and 2.25x barlow. How can I attach them (or at least the Zoom) to a Canon EOS RP mirrorless camera to use with my Celestron NexStar 8e telescope? Thank you.

    Answer rated: 5
    Please take a look at this PDF Manual:
    https://www.baader-planetarium.com/en/downloads/dl/file/id/444/product/1211/digiscoping_camera_adaptations_for_afocal_photography_and_eyepiece_projection.pdf
    Rule of thumb is that the distance between camera and eye piece should be the diagonal of the sensor. Also please notice that the camera is
    rotating when you´re zooming. The quick change ringe then is a helpful tool. Best is to start without the barlow because this set up produces
    already high effective focal lengthes. A possible setup you can see here:
    https://assets.baader-planetarium.com/media/extendware/ewimageopt/media/inline/b8/1/baader-hyperion-universal-zoom-mark-iv-8-24mm-eyepiece-1-1-4-2-ac5.jpg
    I recommend two 15mm extender rings to receive the correct distance.
    Answer by: Baader Web Team (Admin) on Oct 11, 2021 10:06:00 AM
  270. Rated: 14
    10/13/2021 6:23 PM Baader Double T-Filterholder 1¼"
    Will this work in a telescope imaging train? Mainly between t adaptrer and t ring?

    Answer rated: 4
    Sorry this will not work. This product has "two" male threads - so to say. But t´he two parts you mention will require one male and one female thread.
    Answer by: Baader Web Team (Admin) on Oct 14, 2021 10:16:00 AM
  271. Rated: 13
    10/19/2021 12:13 AM 2" BDS-NT Baader Diamond Steeltrack® Focuser
    I want to mount this focuser on a flat (wood) square tube and need to determine the diameter of the hole to make and how much margin for error I have. It seems that I need a hole that is slightly larger than the draw tube, but most commercial scopes have a larger hole. Also, I want to drill the proper holes for the bolts. Please advise.

    Answer rated: 2
    Surely the techincal drawings of the Items will be helpful for you, please see:
    https://www.baader-planetarium.com/en/downloads/dl/file/id/30/product/2859/bds_nt_dimensions_technical_drawing.pdf
    https://www.baader-planetarium.com/en/downloads/dl/file/id/31/product/2859/bds_nt_versabase_dimensions_technical_drawing.pdf
    For most of our products you can find further informationen always under the link "Downloads" like manuals, drawings, software, etc.
    Answer by: Baader Web Team (Admin) on Oct 19, 2021 8:32:00 AM
  272. Rated: 13
    9/9/2016 1:29 AM Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
    Are the BBHS coatings easy to clean? Do the coatings have a life comparable to your dielectric coatings? Do the coatings degrade over time and at what rate? Is there a difference in performance between your dielectric diagonal and the BBHS one, what are the differences and are they significant or very slight? I own an early Televue APO 4 inch refractor.

    Answer rated: -16
    BBHS-mirror coatings require the same care during cleaning as you would give to the protected aluminum-coatings of a Newtonian telescope. Only dielectric coatings have the ultimate hardness to withstand any kind of mistreatment during a cleaning procedure - very similar to our Phantom-Group hard antireflection coatings applied onto our lens surfaces.

    Any reflecting telescope with classic coatings can attain a lifetime of 20 or 30 years - correct handling provided. The same accounts for our protected silver-coatings, whereas the position of a stardiagonal within the optical train does provide much better protection against environmental influences, compared to the exposed surface of a primary telescope mirror.

    We do regard the benefit of the BBHS hardsilver coating to be quite noticeable, compared to the reduced spectral range offered by a dielectric coating. Please check in the Internet for statements that would verify our position. Or look for the very extensive tests on star diagonals, performed by William Paolini (see tab "Downloads".

    Please read more on the properties of our star diagonals and our design philosophy here: http://www.baader-planetarium.com/en/blog/baader-bbhs-reflective-properties/
    Answer by: Baader Web Team (Admin) on Sep 15, 2016 8:22:00 AM
  273. Rated: 13
    1/21/2019 3:28 PM Baader L-RGB CCD-Filterset
    I have a Celestron 11" RASA. I am using Baader high speed F/2 H-alpha / S-II / O-III filters.
    1. Are these LRGB filters suitable, do the LRGB filters need to be matched to the F/2 as well similar to the H-alpha etc.?
    2. If they are suitable are they parafocal with the high speed F2 filters? So I can focus using the L filter and swap to the H-alpha ?
    Thank you.

    Answer rated: 14
    1. Since the LRGB have a wide bandpass, the focal ratio of the telescope is not relevant. You can use them with your instrument.

    2. This depends on the thickness of the filters. If you are using LRGB and narrow band filters of the same size,
    they have the same thickness, therefore they are parafocal.

    Answer by: Baader Web Team (Admin) on Jan 30, 2019 5:04:00 PM
  274. Rated: 13
    9/13/2020 2:57 AM Baader Ultra-Narrowband H-alpha 3,5nm Filter
    Hello,
    What bandwidth is recommended for H-alpha imaging at f/15?

    Answer rated: 23
    We recommend 7nm so that exposure times will be acceptable
    Answer by: Baader Web Team (Admin) on Sep 14, 2020 11:58:00 AM
  275. Rated: 13
    2/8/2020 4:58 PM Filter cell 2" Low Profile, 6mm height
    What has to be the maximum and minimum diameter of an unmounted filter in order to properly fit into the filter cell 2" low profile? Is a 50mm diameter filter going to be suitable to be mounted in your 2" filter cell? Thank you.

    Answer rated: -1
    Unfortunately a 50 mm filter will not fit into our cells because the connecting male/female (standard) threads measure 48mm as outer diameter - and consequently the female side must be smaller then that in clear diameter, otherwise filter cells could not be combined. Accordingly the largest glass diameter could be 47.5 mm and the smallest possible size would be 46.5 mm, whereas this already will be problematic because the filter substrate will need some camfer (ground bevel) in order to protect the glass from chipping. So in reality the filter should not be smaller than 47 mm.
    Answer by: Baader Web Team (Admin) on Feb 17, 2020 11:11:00 AM
  276. Rated: 13
    7/14/2022 9:28 AM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    Can you share Phantom Group coating transmission/reflection plot? I am looking for it everywhere, but cannot find. I am interested especially in values for NIR region (above 700nm)

    Answer rated: 7
    Phantom-coating-group is optimized for photo/visual from 400 to 700 nm. Above that the properties very quickly become similar to uncoated glass.
    Answer by: Baader Web Team (Admin) on Jul 14, 2022 2:05:00 PM
  277. Rated: 13
    11/9/2022 12:31 AM Baader LRGB Filter Set – CMOS-optimized
    What is the optical thickness of the each of the 2" diameter LRGB, CMOS-optimized Baader filters and, as well, the optical thickness of each of the Baader 3.5 / 4nm Ultra-Narrowband Filter-Set – CMOS-optimized (H-alpha / O-III / S-II) for F > 3.4?

    Answer rated: -10
    The optical thickness of a filter is 1/3 of the filter glass thickness. You can find the filter (glas) thickness of each filter when you scroll down on the product page and click on "Specifications"
    Answer by: Baader Web Team (Admin) on Nov 9, 2022 8:25:00 AM
  278. Rated: 13
    2/18/2020 6:49 PM Baader MaxBright® II Binoviewer with case
    What is the lightpath length of this binoviewer?

    Answer rated: 1
    The value of 110 mm +/- ca. 1mm (same as in the Mark V) was measured on a refractor. The small error margin of the measurement is caused mainly because of the diopter adjustment. Because of the not-standardized position of the field stop in eyepieces, it is always a good idea to plan with a security margin of some more millimeters.
    Answer by: Baader Web Team (Admin) on Feb 19, 2020 8:53:00 AM
  279. Rated: 13
    11/12/2021 4:02 AM Diamond Steeltrack® S58 to M68a BDS-Adapter
    Can this be used to directly mount a Paracorr Type 2 to a Steeltrack focuser? If so, would there be any additional adapters required?

    Answer rated: -10
    Unfortunately we don't sell a Paracorr Type 2 and don't know its thread sizes. So we can't answer your question without that information.
    Answer by: Baader Web Team (Admin) on Nov 15, 2021 7:43:00 AM
  280. Rated: 13
    7/21/2021 11:40 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I would like to purchase a Click Lock Adapter to replace an Explore Scientific M48x0.75 Adapter for FFFR (SKU M48-0750.7x). Where should i order from if you have the correct adapter?

    Answer rated: 1
    We do have Baader 2" ClickLock M48i clamp (2" filter/photo thread) #2956248 with a female M48-thread.
    If you are in the USA, please contact alpineastro.com, our distributor for the USA. You can also use our dealer locator at https://www.baader-planetarium.com/en/storelocator
    Answer by: Baader Web Team (Admin) on Jul 22, 2021 10:50:00 AM
  281. Rated: 13
    2/26/2020 7:27 AM Baader zero-tolerance protective Canon DSLR T-Ring T-2/M48 and 2"
    I work with a Cambo x2 pro system mounted on my Canon 5ds.
    Now i want to experiment with UV photography so i bought a SCHNEIDER-KREUZNACH COMPONON 60mm f/5.6 ENLARGER LENS which fits on my cambo x2 pro system. I'm not sure where to place the uv-filter, in front of my lens or is it better to place it in front of my body? For example: if i buy a Baader zero-tolerance protective Canon DSLR T-Ring T-2/M48 and 2" and put a 2" UV filter in there, does my EF mount cambo fit on the T-Ring or do i have to buy another adapter to do so? I'm a bit lost, can someone help me out? Thanks

    Answer rated: -12
    Der Protective T-Ring hat eine Baulänge von 12mm und ist inclusive Filter (die optisch wirkasame Baulänge verlängert sich, wenn ein Filter in den Strahlengang eingebracht wird, abhängig von der Dicke des Filters) etwas länger als ein Standard T-Ring.
    Wir kennen das Combo-System nicht - es ist schwer zu sagen, ob genug Platz vorhanden ist und dann noch der Fokus erreicht wird.

    Komplett unvorhersagbar ist es, ob durch eine verkippte Linse irgendwelche störenden Reflexionen zwischen Filter und Objektiv auftreten. Zwischen Kamera und Filter ist das kein Problem, und wenn es Reflexe zum Objektiv gibt, sollten sie eigentlich zur Seite hinausgespiegelt werden - falls sie dort nicht auf irgendwelche reflektierenden Flächen im Objektiv treffen. Das müsste ma wirklich ausprobieren...

    Einfacher wäre es wohl, wenn Sie den Filter vor das Objektiv setzen. Wenn es ein Filtergewinde hat, benötigen Sie dazu den
    2" Filterhalter M48 auf SP54 für (D)SLR # 2408166
    Dann steht Ihnen das SP54-Systemgewinde zur Verfügung, und Sie können mit den Hyperion DT-Ringen
    https://www.baader-planetarium.com/de/zubehoer/adapter-foto-zubehoer/kameraadapter/dt-ringe.html
    auf die gängigen Filtergewinde von Kameras (oder andere Step-Up/Down-Ringe) adaptieren.

    Nachteil dieser Adaption: Der Filter sitzt vor dem Objektiv und kann bei Weitwinkel vignettieren. Dafür sind Reflexionen und Abstände kein Problem.
    Answer by: Baader Web Team (Admin) on Feb 26, 2020 9:22:00 AM
  282. Rated: 13
    4/6/2021 4:09 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I have a BAADER CLICKLOCK for SCT that I would like to convert for an Explore Scientific 80ED APO Refractor. Can I buy separately the adapter for that?

    Answer rated: 8
    Most of the adapters inside of the ClickLocks are not sold seperately, and the ClickLocks bodies are not all the same. But we do have have several SC-adapters, maybe one also fits to your telescope and the the SC-ClickLock: https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/2-inch-sc-thread.html
    Answer by: Baader Web Team (Admin) on Apr 6, 2021 12:44:00 PM
  283. Rated: 13
    8/16/2022 9:32 PM Baader1¼" Amici-erecting-prism 45° with 24mm free aperture
    Are caps provided with this prism ?

    Answer rated: 3
    Yes there are dust caps on each side
    Answer by: Baader Web Team (Admin) on Aug 17, 2022 8:23:00 AM
  284. Rated: 13
    12/12/2022 5:16 AM Baader Neodymium (Moon & Skyglow) Filter
    If removed from the 2” cell, will the Baader Neodymium Moon and Skyglow Filter fit into a FCCT 47.4mm filter slider?

    Answer rated: -2
    Yes, all Baader 2" filters will fit into the FCCT 2" (47.4mm) filter slider when being removed from the cell.
    Answer by: Baader Web Team (Admin) on Dec 12, 2022 7:37:00 AM
  285. Rated: 13
    3/31/2022 10:51 PM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    Can I use this eyepiece with my newtonian telescope? When I put this eyepiece on the scope it is totally blurry. Seems that the eyepiece needs to be about 20" approx. away from the focuser to get a focused image.

    Bud

    Answer rated: 4
    It should be no problem to use the eyepiece on any telescope. We have designed it so that it also works with spotting scopes which have a short back focus, if you use the spotting scope adapter (A) instead of the telescope adapter (B). This means that the eyepiece needs to be some mm closer to the telescope than most 1.25" eyepieces, if you use the spotting scope adapter.

    But f you can use standard 1.25" eyepieces, you can use the Zoom, too, especially with the telescope adapter (B). Most 1.25"pieces have got the field stop more or less at the connection between the 1.25" nosepiece and the wider body holding the lenses.

    If you need to place the eyepiece farther away from the telescope, please check the following things:
    - First of all: Can you reach focus with other eyepieces?
    - Are you using the telescope adapter (B)?
    - Can you use a 2"/1.25" reducing adapter instead of the 2" nosepiece? This gives you sometimes more than a centimeter

    With a Newtonian, there are two more things to check:
    - Is there an extension tube for visual use included? Many Newtonians have got an extension tube at the focuser. This has to be removed for photography with a DSLR (which needs to be 55mm closer to the image plane of the telescope than an eyepiece).
    - Was the main mirror moved upwards in the telescope tube (by purpose or during collimation)? This is done sometimes to achieve focus with a DSLR and may result in the impossibility to achieve focus with an eyepiece.
    Answer by: Baader Web Team (Admin) on Apr 1, 2022 9:39:00 AM
  286. Rated: 13
    10/26/2020 10:43 PM 2" BDS-RT Baader Diamond Steeltrack Focuser
    Will the BDS-RT fit on the Baader Vario 10X60 finder scope? Will I need an adapter? Which adapter?

    Thank you,
    Bob

    Answer rated: 13
    Unfortunately this wont work for the following reasons:
    1. the focuser would be heavier than the scope
    2. there is not enough backfocus.
    3. the included standard sliding focus is the ultimate help to save on backfocus and it works precisely if the centering screws are pretightened with care.
    Answer by: Baader Web Team (Admin) on Oct 27, 2020 9:03:00 AM
  287. Rated: 13
    8/24/2021 2:33 AM 2" Research Grade TZ-3 Telecentric System (3x focal length)
    Other than the obvious differences in magnification and position of the focal spots, is the TZ3 significantly different from the TZ2 ? I currently have a TZ2 on a home-built Halpha system and it is giving great results but I'd like a little more magnification. The TZ3 seems to have a different appearance than the TZ2 and TZ4 and is marketed toward SolarSpectrum etalons. Is there anything special about the TZ3 that makes it significantly different from the TZ2 and TZ4 ?

    Answer rated: 12
    The main difference between TZ-3 and the older constructions TZ-2 and TZ-4 is that TZ-3 has 46mm clear aperture at the H-alpha-filter entrance side. This is suitable for research grade SolarSpectrum H-alpha filters. Another difference is the longer working distance of 250mm for optimized focal length reduction with a telecompressor and suitable room for adapting a binocular viewer. Optically the image quality is as good as you know it from your TZ-2.
    Answer by: Baader Web Team (Admin) on Aug 24, 2021 9:32:00 AM
  288. Rated: 13
    4/12/2020 3:55 AM Baader UFC 2" (M48) Filter Slider
    What is the purpose of the thin black 'washer' in Baader UFC 2" (M48) Filter Slider? Is it for some filter with thread protruding too much? Or is it for correcting optical path distance?

    Answer rated: 21
    The purpose of these washers is indeed to prevent the thread protruding too much. Below is the original message we published back in 2017 when we got aware of this issue. It is a mistake that none of this information made stayed on the product page, we will fix that asap.

    We regret the fact that some of our cell-mounted 2" filters and those of other manufacturers slightly extend over the back of the 2" (M48) filter slider. Unfortunately, some filter threads from our production actually have a 0.3 mm longer thread. We had tried to provide the maximum optical height for filter holders from other providers - and that unfortunately has gone to our own disadvantage. <br>
    We are currently producing very thin spacer rings, so that our, as well as the filters of other manufacturers can not be threaded in too far. We will be pleased to send you these on request. For the moment, we ask you not to thread the filter completely so that the thread does not overlap.
    Answer by: Baader Web Team (Admin) on Apr 14, 2020 9:25:00 AM
  289. Rated: 13
    11/3/2020 8:33 AM Baader IR-Pass Filter (685 nm)
    Is it possible to modify the 2" filter in order to fit into an Optec IFW filter wheel that is designed for 50mm filters?

    Answer rated: 12
    Unfortunately we don´t have an solution or an adapter for this purpose
    Answer by: Baader Web Team (Admin) on Nov 3, 2020 9:11:00 AM
  290. Rated: 13
    6/7/2017 8:51 PM Alan Gee Telecompressor Mark II (T-2 part #20)
    I see teleskop-express.com has a special edition Alan Gee Tele for SCT focuser. So can i make one with a regular Alan Gee and a regular 2"-T2 adapter.It seems the SE AG tele has a short threaded tube over AG tele compressor then the 2"-T2 over those tubes...Also if i buy SE AG from Teleskopexpress are the 2 rubber rings and metal ring sold alone if I wanted to use inside my Celestron C5 it would seem there is a middle tube missing from SE AG?Any one else sell SE AG?I just got a Baader 31mm,,very nice glass.Thanks for your time

    Answer rated: 22
    You can modify any existing Alan Gee like the TS Special Edition. The ring #1508025 is screwed into the telescope-end of the 2"-adapter #2408150, and the Alan Gee without the two spacer rings is placed between these two parts.

    We do not sell these spacer rings alone, but maybe TS has them or even includes them with their Special Edition.
    Answer by: Baader Web Team (Admin) on Jun 12, 2017 1:19:00 PM
  291. Rated: 13
    10/28/2023 4:23 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Looking for a 2” clic loc that will fit a mead 12” GPS ?

    Answer rated: -6
    In general, our ClickLock 2" clamps should fit all Schmidt Cassegrain telescopes with a 2" threaded connection. Unfortunately, the threads of older telescopes from this manufacturer have very large tolerances and are therefore not 100% true to size, so that it cannot be guaranteed in every case that our threads, which are cut exactly to size, will fit.
    Answer by: Baader Web Team (Admin) on Oct 30, 2023 8:36:00 AM
  292. Rated: 13
    7/24/2017 9:38 PM Baader Prism Diagonal T-2/90° 32mm
    I would like to know if I can screw in my Takahashi Extender-Q directly into this prism diagonal or would I need an additional adapter.
    Thank you.

    Answer rated: -11
    The Extender-Q should come with some long and short T-2-adapters for the eyepiece-side, so you can screw the prism directly onto these extension tubes of the Extender-Q. You might want to think about a T-2 quickchanger for rotating the prism into a convenient position, if there is enough backfocus. The prism has got an optical length of 35mm.
    Answer by: Baader Web Team (Admin) on Jul 26, 2017 1:07:00 PM
  293. Rated: 13
    10/7/2022 3:15 PM Baader 2" to 1¼" ClickLock Reducer (T-2 part #15B)
    What would be the optical length of this part when used as an eyepiece holder mounted directly to a T2 diagonal housing?

    Thanks

    Answer rated: 27
    It height is then 33mm.
    Answer by: Baader Web Team (Admin) on Oct 11, 2022 12:19:00 PM
  294. Rated: 13
    10/9/2022 7:51 PM Baader Nose piece 1¼" / T-2 (T-2 part #14)
    will this work as a replacement 1.25 nosepiece for the clickstop zoom mk3. ??
    i have lost the 1.25 barrel.. thanks

    Answer rated: -2
    No, unfortunately this won't work. This nosepiece has a T-2 thread. The thread on the Hyperion MK III Zoom however is M36,4
    Answer by: Baader Web Team (Admin) on Oct 14, 2022 12:23:00 PM
  295. Rated: 12
    2/2/2023 5:12 AM Baader 36mm Hyperion Aspheric 2" Eyepiece
    Se puede ver las pléyades completas con este ocular?
    Can you see the entire Pleiades with this eyepiece?

    Answer rated: 7
    Depende de la distancia focal de su telescopio. Las Pléyades tienen una extensión de aproximadamente un grado en el cielo, lo que equivale aproximadamente al doble del tamaño de la Luna llena. El campo de visión del telescopio se puede calcular con la fórmula: Campo de visión ocular x distancia focal ocular / distancia focal telescopio. Con una distancia focal del telescopio de 1000 mm, el cálculo sería 72x36/1000 = 2,6 grados. Eso sería suficiente para obtener una vista completa de las Pléyades.

    It depends on the focal length of your telescope. The Pleiades have an extent of about one degree in the sky, which is about twice the size of the full Moon. The field of view of the telescope can be calculated with the formula: Eyepiece field of view x eyepiece focal length / telescope focal length. With a telescope focal length of 1000 mm, the calculation would be 72x36/1000 = 2.6 degrees. That would be enough to get a complete view of the Pleiades.
    Answer by: Baader Web Team (Admin) on Feb 2, 2023 8:58:00 AM
  296. Rated: 12
    2/3/2022 6:37 PM 2" BDS-RT Baader Diamond Steeltrack Focuser
    I would like to replace the factory fouser on my Sky-Watcher Evostar ProED 80 mm f/7.5 ED APO refractor telescope with your Diamond Steel focuser, but can't find the proper adapter. The factory focuser inserts into the optical tube and is secured with three screws. The screws pass through holes in the optical tube and then thread into the factory focuser. The focuser insertion depth into the optical tube 15mm and the inside diameter of the optical tube is 96,66mm.

    Please advise

    Answer rated: -1
    The adapter you need is the RT-Adapter Ø 97mm Diamond Steeltrack® (# 2957282). It is designed to connect to refractors with 97mm inner diameter.
    Answer by: Baader Web Team (Admin) on Feb 8, 2022 3:52:00 PM
  297. Rated: 12
    1/20/2020 9:43 PM The Original: Baader Planetarium
    I have a Baader Planetarium that is in good working order. However, the little white globe that sits in the center of it (over the little electric bulb) is slightly broken at its base and needs to be replaced. Can you please help me get a replacement little white globe?
    Steve Shackelford
    Professor of Aeronautics
    Mt. San Antonio College
    Walnut, California

    Answer rated: -6
    Thank you for using our Baader Planetarium which we now produce in the 53rd year.
    Unfortunately we only have a few cosmetically imperfect solar caps left from the plastic molded version that we used for long years.
    Today we are using a glass-molded cap, because it is more durable. But this would require to modify the lamp holder of your planetarium - and it would be quite expensive to send the middle part of your planetarium (without the star globe) to us in Germany for doing the modification. So if you were to accept the plastic cap with a few dimples, we could send it to our US-distributor for Baader astronomical products (www.AlpineAstro.com) so that he could send it to you at an economical outlay of altogether US $ 25,-

    Please let us know if this would be acceptible.
    Answer by: Baader Web Team (Admin) on Jan 21, 2020 10:34:00 AM
  298. Rated: 12
    3/16/2021 10:09 AM Alan Gee Telecompressor Mark II (T-2 part #20)
    I recently acquired the Alan Gee Telecompressor to replace the stock Celestron x0.63 reducer. I'm using it only for photographic purposes on my C9.25, with an ASI294. It's a really well-built piece of kit.
    I religiously followed the instructions from the manual, page 12: I bought the #2454410 centering ring, the short BTA #2408160, kept the two supplied 19mm spacers with the Telecompressor, and used 45.5mm T2 spacers to achieve a 121mm working distance. Surprisingly, that yielded an effective focal ratio of f/D = 5.2, which was way too low (stars in the corner were distorted). I then removed the 45.5mm T2 spacers completely, and got around f/5.6 (still a bit of star distortion but quite less so).
    Do you see why the Telecompressor yields so much unexpected reduction? Is the 121mm distance really computed from the Sharpley lens that is on the camera-side, or the one farther in the baffle of the telescope?

    Answer rated: 30
    Aorry - distance is calculated for the geometric middle between the two lenses. And we must admit - this product was designed 30 years ago - when people used emulsion film and wondered how to evacuate film layers prior to every exposure...
    With modern CMOS-cameras we see the end of this product coming - since the original SC-optical design does not support airy disc sizes smaller than ~ 8 micron. So no SC-compressoer has a chance to live up to the tiny pixel sizes.
    For this reason Celestron had redesigned the SC to incorporate a matched corrector, situated within the optical train at a position we cannot attain with the Alan Gee. So whatever distance you choose - modern imaging devices will mercilessly exhibit the limitations of the system as a whole.
    Answer by: Baader Web Team (Admin) on Mar 19, 2021 11:47:00 AM
  299. Rated: 12
    3/17/2021 5:27 PM Baader U-Venus-Filter (350nm)
    Is it possible to have this filter in a custom size such as 8x5 cm?

    Answer rated: -12
    We are very sorry, we cannot manufacture custom sizes with our mass production processes. Maybe if you buy thousands, but not for one item and not for a few...
    Answer by: Baader Web Team (Admin) on Mar 18, 2021 8:33:00 AM
  300. Rated: 12
    10/27/2021 7:48 PM Baader T-2 / 90° Astro Amici-Prism with BBHS ® coating
    Which accessories do I need to connect this diagonal to a Celestron Edge HD 8? I think I may directly screw the diagonal to the tube but is there another alternative as I also use the focal reducer.

    And what about the eyepiece? Is it compatible with 2’’ and 1.25’’?


    Answer rated: -5
    There are many ways to connect the prism onto the telescope. From OTA to the prism I´d recommend the BTA adapter:
    https://www.baader-planetarium.com/en/baader-t-adapter-(bta)-for-sc-and-mak-telescopes-(t-2-part-21).html
    For 2" eye pieces our Clicklock clamp is for sure usefull #2956242
    https://www.baader-planetarium.com/en/baader-2%22-clicklock-eyepiece-clamps.html
    The reducer is actually meant to be used it only for astrophotography purpose. Better take an eye piece with different focal length.
    The only limittation of the prism when combined with eye pieces is with long focal 2" models are used. However the human eye almost cannot
    detect obstructions of up to 30% so therefore it isn´t really a limit. The illuminated field is limited by the aperture of the prism but shouldn´t be
    overestimated.
    Answer by: Baader Web Team (Admin) on Oct 28, 2021 12:28:00 PM
  301. Rated: 12
    6/17/2020 6:15 AM Baader Wide-T-Ring Nikon Z (for Nikon Z bajonet) with D52i to T-2 and S52
    I have a mewlon 250 crs and Nikon Z6 . what i need more with baader wide T-ring for Nikon Z bajonet ref 2408335. Cordially.

    Answer rated: 7
    This depends on the connections of your telescope (and if you need to keep a certain distance to a reducer) - I'm sorry, but we don't have all data here available.

    The easiest way is usually the S52 barrel #2958551, then you can adapt it like any 2" eyepiece.

    For all other configurations, please let us know which threads you have available or if you need to keep a certain distance.
    Answer by: Baader Web Team (Admin) on Jun 17, 2020 9:24:00 AM
  302. Rated: 12
    11/4/2021 1:19 AM StarAid Revolution Standalone Autoguiding - Revision B
    Will the StarAid dithering work well for a Canon Ra on a Skywatcher 200/1000 OTA?

    Answer rated: 0
    This has not been tested by us but because its a comparable easy standard setup we do not see a reason why it should not work.
    Answer by: Baader Web Team (Admin) on Nov 4, 2021 8:53:00 AM
  303. Rated: 12
    9/26/2020 1:17 PM Baader SC / HD Ultra Short T-Adaptor, 9mm optical length
    The optical length is listed as 7mm here. Many resellers are listing it as 10mm. My own measurements with calipers say 9mm. Are there multiple versions of this adapter? What is the correct expected optical length?

    Answer rated: 4
    Correct is actually ~7,5mm with the T-2 Finetuning-Ring from the top thread removed. When you leave the finetuning ring on, it is about ~8.3mm.
    Answer by: Baader Web Team (Admin) on Sep 28, 2020 10:11:00 AM
  304. Rated: 12
    5/30/2023 12:35 PM QHY 268 M/C BSI Cooled Medium Size APS-C Cameras (various versions available)
    Most colour camera's have an UV/IR cut window, is it true the QHY268C has just an AR window, and always needs a UV/IR cut filter, or another (dual band, IR pass) filter of some other sort?

    Answer rated: -2
    That is correct. The QHY268C has an AR window only, so you will need to use an UV/IR Cut filter. The advantage with an AR only window is the fact that you can still do IR imaging with an IR Pass filter.

    Note: This information was originally listed incorrectly in QHY’s manual that it did have an IR cut window but was later confirmed by QHY that it’s AR only and has been corrected in the manual.
    Answer by: Baader Web Team (Admin) on Jun 5, 2023 9:17:00 AM
  305. Rated: 12
    10/12/2016 9:30 PM Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp
    What is the outside diameter of the nose piece? The precise inside diameter of the focusing tube on my refractor is 2.000 inches at 20 degrees Celsius +/- 0.001 inches. If it turns out that the nose piece is also exactly 2 inches, I could turn the nosepiece on a lathe. Your thoughts? What nose piece diameter would you suggest, if I had to turn it on a lathe?

    Answer rated: 15
    the outside diameter is 2" - equal to 50.8 mm (- 0.05 / -0.1 mm).
    We strive to have this fit into any 2" standard eyepiece holder and had no problems so far (we do this for quite a while).
    Answer by: Baader Web Team (Admin) on Oct 13, 2016 8:20:00 AM
  306. Rated: 12
    7/9/2020 3:08 AM Baader T-Ring Canon EF (EOS) to T-2
    If I use this with a Canon EOS 5D Mark IV will it work with my telescope's field flattener which has 55 mm of back focus without any other T-2 system parts?

    Answer rated: 6
    Yes! The optical length of the camera is 44mm and this bayonet ring is 11mm so you get the needed 55mm back focus.
    Answer by: Baader Web Team (Admin) on Jul 9, 2020 9:07:00 AM
  307. Rated: 12
    1/10/2021 7:09 AM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    will this fit on a GSO RC8?

    Thanks

    Matt

    Answer rated: 14
    The SteelTrack SC focuser comes with 2" and 3.3" SC-threads; as far as we can see (please check your teelscope's manual) the RC has got an M90x1-thread.

    For the RT-version (for refractors), we do have RT-Adapter M90x1 Diamond Steeltrack® (Skywatcher) # 2957283, but it does not fit on the SC-focuser.

    The SC-focuser has got a length of 93mm plus 30mm of travel;
    the RT-focuser has got a minimum length of 78mm plus 80mm of travel.

    So, you can probably use the RT-version # 2957210 with the M90-adapter instead of the SC-version.
    Answer by: Baader Web Team (Admin) on Jan 11, 2021 1:28:00 PM
  308. Rated: 12
    7/10/2020 6:18 PM Baader UFC S70 / T-2 Adapter Telescope-Adapter (optical height: 1 mm)
    The picture shows what appears to be a 0,3mm M48 fine-adjustment ring (#2457916). Is that what is shown in the picture? If that is correct is one included with this item?

    Answer rated: 11
    If the T2 male thread is too long it can cause a collition with the filter slider. This ring is not a #2457916 it is just a little helper to avoid a collition.
    Answer by: Baader Web Team (Admin) on Jul 13, 2020 10:21:00 AM
  309. Rated: 12
    3/12/2022 12:41 PM Baader Wide-T-Ring Nikon Z (for Nikon Z bajonet) with D52i to T-2 and S52
    I have a Nikon Z6 what do i need to attach it to a celestron regal m2 80ed

    Answer rated: -2
    You need the Nikon Z-adapter and the T-adapter which is included with your spotting scope (some Celestron spotting scopes have the T-thread already included in the eypiece, under the rubber eye cup.

    The Nikon Z with the T-ring has got a flange distance of ca. 24mm. The distance between camera sensor and eyepiece should be about 95mm for a full frame camera, otherwise there will be vignetting and distortions at the edge of the image. So, you should use T-2-extensions for an additional ca. 70mm, e.g. 1x Baader T-2 / 40 mm Extension Tube (T-2 part #25B) # 1508153 and 2x Baader T-2 / 15 mm Extension Tube (T-2 part #25A)
    # 1508154

    We also recommend replacing one 15mm-extension with a quick changer (Baader TQC/TCR Heavy duty T-2 Quick Changing System (T-2 part #06A & #07) # 2456322 or Baader Complete T-2 Changer System (T-2 parts #06 & #07) # 2456321). Then you can rotate the camera easier as it is otherwise screwed onto the eyepiece, and you'd have to rotate the whole eyepiece to adapt the camera orientation.

    We have some examples in this PDF:
    https://www.baader-planetarium.com/de/downloads/dl/file/id/443/product/3117/digiskopie_kameradaptionen_f_r_afokale_fotografie_und_okularprojektion.pdf
    Answer by: Baader Web Team (Admin) on Mar 14, 2022 8:28:00 AM
  310. Rated: 12
    4/9/2021 4:34 PM Diamond Steeltrack® S58 to T-2 BDS-Adapter
    Can i use this with a coma corrector threaded to the telescope side?

    Answer rated: 0
    Unfortunately we don´t know a combination with a coma corrector that will fit. Coma Correctors like our MPCC have 2" barrel to come in the right place in the optical path. And they provide a different thread on the camera side that is not fitting to this adaptor
    Answer by: Baader Web Team (Admin) on Apr 13, 2021 8:16:00 AM
  311. Rated: 12
    3/19/2022 9:11 AM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    Hi. Can your BDS-SC focuser be fitted to the m90x1 thread on the GSO Ritchie Cretian 6” and 8”? The Crawford focuser sold with these scopes are very substandard.

    Answer rated: -3
    For the GSO RC, you would choose the BDS-RT (# 2957210) in combination with the RT-Adapter M90x1 (# 2957283).
    That adapter only fits the BDS-RT, not the BDS-SC.

    Please note that you will potentially need an M90 extension, so that the focuser can reach its minimum focus position.

    A user has explained the exact situation in his review:
    https://www.baader-planetarium.com/en/2%22-bds-rt-baader-diamond-steeltrack.html/#rw_495
    Answer by: Baader Web Team (Admin) on Mar 21, 2022 10:21:00 AM
  312. Rated: 12
    6/17/2023 12:23 PM StarAid Revolution Standalone Autoguiding - Revision C
    I bought the Staraid Revolution C through one of Baaders UK distributors under the assurance that support would be through Baader. So that's why I'm posing this question here. The Staraid.ai website doesn't list version C so that's the first question. Why not? Is the Staraid.ai website actually dormant? Another question, therefore, is where to get software updates for version C? And will there actually be updates? Also, Staraid stated that further development would add mount-control functionality to the plate-solving capability. Is that likely to happen and where would it be made available as a software update? There's another reference to being able to use Staraid connected to PC. Are there drivers or software associated with that? Many questions. Thanks for considering them.

    Answer rated: -1
    We cannot answer your questions related to Staraid.ai website because this is not our UR, it belongs to the manufacturer, we are not responsible for the content. There is no driver and no software to control Staraid via PC because it is designed as stand alone guider for smartphone control. Unfortunately we also do not know when the manufacturer will implement which new features in future. Very sorry!
    Answer by: Baader Web Team (Admin) on Jun 19, 2023 11:08:00 AM
  313. Rated: 12
    5/5/2017 4:44 PM Hyperion Universal Zoom Mark IV, 8-24mm Okular (1¼" / 2")
    Somewhere I read that the Mark IV zoom was made water and dust resistant (waterproof?). Is this correct? This is more important for spotting scope user probably than astro users but would be a great feature. I suspect the zoom mechanism would be hard to seal though.

    Answer rated: 11
    The top lens doublet as well as the zoom ring on the Mark IV and previous Hyperion Zoom models are indeed O-ring sealed, to permanently shield off water (and dust) entry when the Hyperion Zoom is exposed to sudden rainfall. while inserted into a spotter for instance.

    What is not sealed in the same way is the front lens element inside the 1 1/4" nose piece during its travel up and own. We sacrificed that O-ring seal in all zoom models in order to make the Click-mechanism work effortless and to avoid that "hard feeling" of most other zooms when changing magnification. This is certainly a concession to its primary use on astronomical telescopes. Here the zoom ring must work without "resistance". On most other zooms the telescope will come off target or start to "wiggle" everytime when rotating the zoom ring actually is a real effort.

    Effortless handling - is what we try to achieve with this zoom - as well as intuitive indication of the distinct magnification stops. This smoothness in operation is just one of the reasons that made this Zoom such a success among Astro-Amateurs - without most people noticing even why they have that positive feeling, compared to using other zoom eps.

    Also when using the Mark IV on your spotter you will find it a side-benefit, to reach high magnification without loosing target - just because the zoom were so darn stiff to rotate.

    For your application attached to spotting scopes, what remains is that you won´t have any water entry while the Hyperion Zoom is mounted onto the spotting scope. The bottom design of the zoom creates an overlapping shield, to not have water creeping into the 1 1/4" receptor.
    Answer by: Baader Web Team (Admin) on May 7, 2017 4:03:00 PM
  314. Rated: 12
    4/6/2020 11:13 AM 2" BDS-RT Baader Diamond Steeltrack Focuser
    Hi, is there a synta small format (86.4mm) RT adapter available for diamond steeltrack refractor focuser?

    Answer rated: 44
    The small Synta refractors don´t have the necessary backfocus and tube diameter for attaching the Diamond Steeltrack, therefore we have no adaptors created for this size
    Answer by: Baader Web Team (Admin) on Apr 6, 2020 11:38:00 AM
  315. Rated: 12
    3/24/2023 10:53 PM Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
    Can I put in any eyepiece without worrying about how long it is? is there a built in safety where it won't hit the mirror? if not how do I measure to prevent this? Thank you!

    Answer rated: 0
    Sorry - you must check this for yourself. We thought we have considered all eyepieces in the market when this product was designed, but every year new eyepieces, barlows,telecentrics asf. are being announced and we did not test those.

    The 2" aperture must not get restricted anywhere in the beam to not create a vignetting "bottleneck". For this reason we could not enter a 1 1/4" protective rest into the beam and - to our knowlede - no one offering a 2" diagonal does that.
    Answer by: Baader Web Team (Admin) on Mar 29, 2023 10:21:00 AM
  316. Rated: 12
    12/15/2021 6:17 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    1) Can the clamp part and <4.1" UNF part of the Baader 2" ClickLock 4.1"i UNF/24G clamp (TEC / Feathertouch)> be separated?
    2) Then, does the 4.1" i UNF part have a female thread of M68X1 like the separately sold product (# 2458191)?
    3) Are the 3 set screw holes drilled on the 4.1" i UNF exactly the same as those on the Feather thouch focuser FT3545?
    thank you.

    Answer rated: -34
    Yes, this ClickLock clamp consists of our M68x1 ClickLock #2956268 and the mentioned 4.1" to M68 adapter #2458191. Both parts can be separated, thus revealing the individual threads. The 3 set screws on the 4.1" should indeed be the same as the large Feathertouch focuser
    Answer by: Baader Web Team (Admin) on Dec 15, 2021 7:40:00 AM
  317. Rated: 12
    8/30/2021 8:17 PM Baader Expansion Ring 2"a/T-2i with 1mm optical path length (T-2 part #28)
    I'd like to use ring 2958242 to attach Mark IV zoom to a Tasco spotting scope. This spotting scope has a detachable eyepiece but I can't mount zoom directly on it. This spotting scope has a T2 external thread, so my plan is to screw expansion ring to the T2 male thread and the Mark IV to the 50,8 thread, through the ring used for 2" barrell. Would it work? Thanks in advance.

    Answer rated: 10
    It is woth trying carefully it with the zero-length adapter 2"a / T-2i x 1 #2454833 - this brings the eyepiece as close as possible to the spotting scope, so chances are very good that it works (if any eyepiece besides the original one works at all).
    But we haven't had a chance to test it at every spotting scope.
    Answer by: Baader Web Team (Admin) on Sep 1, 2021 12:02:00 PM
  318. Rated: 12
    12/28/2021 3:01 AM Sky-Surfer III – Adapter for large telescopes made of ABS
    Is the upper 3/8" or 11mm ?

    Answer rated: -2
    The upper rail is about 14mm at its widest and about 10mm at its narrowest width.
    Answer by: Baader Web Team (Admin) on Jan 7, 2022 10:48:00 AM
  319. Rated: 12
    11/21/2018 8:30 PM Baader L-RGB CCD-Filterset
    So your saying the 36mm filter glass thickness is 4mm while other dealers say 2mm 3mm 4mm whos correct?

    Answer rated: 21
    All filters with 1,25" and 2" have 2mm, only UBVRI have 4mm
    Answer by: Baader Web Team (Admin) on Nov 23, 2018 4:24:00 PM
  320. Rated: 12
    10/4/2019 8:47 PM Diamond Steeltrack® S58 to M48 BDS-Adapter
    are the m55 threads external or internal? I note the threads on the back of the diamond steeltrack are m55 x 1 external, will this adapter thread onto it? Does it have m55 x 1 internal threads?

    Answer rated: -2
    The BDS Direct-Adapters for M68, M48 and T-2 have an S58 dovetail and get clamped with the 6 x M2,5 screws instead of the standard clamp. See for example point 4 on page 4 of the instruction manual. https://www.baader-planetarium.com/en/downloads/dl/file/id/175/product/2856/instruction_manual_for_all_baader_diamond_steeltrack_bds.pdf
    The BDS does have an INTERNAL M55x1 thread on the eyepiece side, we're not sure where you think it would have an M55 external thread.
    Answer by: Baader Web Team (Admin) on Oct 7, 2019 9:17:00 AM
  321. Rated: 12
    8/29/2020 6:19 PM Baader T-Ring Canon EF (EOS) to T-2
    Is it possible to replace the 42mm thread with the 48mm spacer # 2458405, so I could use this correctly with the MPCC? All your recommandations are about using the protective Canon ring but I have no real need for it since I don't use much filters. There is a question similar to mine but as an answer you refer to a graph of the MPCC which doesn't give me the answer I need... Thanks for your help!

    Answer rated: -10
    Unfortunately, the spacer ring has got a diameter of 52mm. The inset of our Canon ring has got a diameter of only 50mm.
    Answer by: Baader Web Team (Admin) on Sep 2, 2020 1:40:00 PM
  322. Rated: 12
    12/5/2020 10:25 PM Baader FlipMirror II Star Diagonal
    I have a Celestron C8 with f6.3 Focal Reducer [FR]. This gives a required backfocus of ~ 105mm from the rear of the FR to the imaging camera sensor. I'm using the BFM-OAG with a ZWO-mini as guide camera, but cannot get the guide camera backfocus to 105mm from the rear of the FR. Is this possible please?

    Answer rated: 24
    There is a black extension tube in front of the ZWO mini. If you remove it, you should be able to insert the camera deep enough into the Off-Axis-Guider to reach focus. Otherwise, you'd have to use T-2 extension tubes to place camera and eyepiece farther away from the FlipMirror (and the reducer...).

    But removing the 1.25"-extension from the ZWO mini should be sufficient. If you then need a shorter 1.25"-extension so that the camera fits better into the Off-Axis-Guider, you can use Baader 1¼" - 31.8mm nosepiece extension with 1¼" filter thread on both sides # 1905130 or an empty 1.25" filter cell as extension (Filter cell 1¼" classic (8mm height) # 2459251 or Filter cell 1¼" Low Profile (6mm height) # 2459251L
    Answer by: Baader Web Team (Admin) on Dec 7, 2020 10:45:00 AM
  323. Rated: 12
    8/2/2018 11:26 PM Baader T-2 Quick Changer with Zeiss Micro Bayonet (T-2 part #06)
    For what connections can I use it? Can I use it to extend t2 barlow for example?

    Answer rated: -3
    The quick changer needs it counterpart, the changer ring #7 to be functional. The changer has T-2 inner thread, the ring T-2 outer thread. If you mount it in between any T-2 connection between two T-2 items, you can take these apart in a second without screwing. It also fits to T-2 barlow. When you put it in between for example a camera T-Ring and the barlow, you can much easier take the camera away or rotate the camera.
    Answer by: Baader Web Team (Admin) on Aug 3, 2018 3:54:00 PM
  324. Rated: 12
    2/15/2017 9:08 AM Baader Sky-Surfer III red dot finder
    What material is the RDF made of? Can it be mounted on a Celestron Nexstar Evulotion ?

    Answer rated: 14
    The material is mostly ABS-plastic material. The Sky Surfer III can mount onto any Celestron tube that is equipped with the two screws for holding a Celestron finder - plus it has the proper shoe to fit into Vixen/SkyWatcher finder ports.

    See the detailed instructions under the tab "downloads" that explain the amount of adapters being the most extensive offered anywhere.
    Answer by: Baader Web Team (Admin) on Feb 15, 2017 9:36:00 AM
  325. Rated: 11
    10/18/2021 11:15 AM Baader 2"/ 2" Thread-Inverter-Ring
    Is this the M48*0.75 thread?

    Answer rated: -3
    No, this is a 2" SC-Thread (50.8 mm). What you're looking for is Conversion Ring M48a/M48a # 2958555
    https://www.baader-planetarium.com/en/conversion-ring-m48a-m48a.html
    Answer by: Baader Web Team (Admin) on Oct 18, 2021 11:46:00 AM
  326. Rated: 11
    1/15/2019 7:52 AM Reducing piece S52 / M48
    Does this part have the s52 dovetail on both sides?

    Answer rated: -3
    The S52 Dovetail is only at the outer side in a way that the inner M48 thread points to the telescope/lense. Please refer the application Images
    according this item.
    Answer by: Baader Web Team (Admin) on Jan 15, 2019 9:43:00 AM
  327. Rated: 11
    10/30/2022 5:26 PM Baader FlipMirror II Star Diagonal
    I've just ordered a Celestron 9.25 XLT telescope for planetary viewing and astrophotography. I think adding a Baader Flip Mirror for my imaging train would be quite convenient. With the flip mirror I will probably only use an eyepiece on one end and a Barlow, UV/IR cut filter, an ADC and a planetary camera on the other end. All this equipment is 1.25 inch. Will I need extra accessories, like a click-lock or specific kinds of threads, to attach everything to the scope and mirror? If so, what kinds would work? Thank you.

    Answer rated: 6
    This depends... The Schmidt-Cassegrains usually offer either a 1.25" visual back or a 2" star diagonal which is screwed onto the 2" (standard SCT) or 3.3" (EdgeHD) thread at the back of the telescope.
    We would recommend to replace it with #2956220 SC / HD (2")-Clicklock (5" SC, 6" SC/HD, 8" SC/HD and 9¼" SC) so that you can use any standard accessories - and easily rotate them into a conveniant position.
    Then, you can attach
    Baader M48 extension tube 30 mm / 2" nosepiece with Safety Kerfs # 2958630
    to the Flip Mirror and use it with the telescope.

    The Flip Mirror itself has got T-2-threads on both ends. For use with Barlow and ADC, it is probably the best if you use T-2-eyepiece clamps on both ports. There are several clamps available: https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/eyepiece-clamps.html?filter_threads_lenssided=536 As the position of the ADC should be orientated on the horizon, it is better to use a clamp than to screw it directly onto the FlipMirror without an option to rotate it.

    As the magnification factor of the Barlow depends on its distance to the sensor, it should probably be mounted behind the Flip Mirror. Together with the ADC, this will move the focus position, but it is hard to say how much - so you will probably need some T-2-extensions to reach the same focus position with the eyepiece on the upper port, too, but you'll have to try out how many T-2-extensions you will need.
    Answer by: Baader Web Team (Admin) on Oct 31, 2022 10:31:00 AM
  328. Rated: 11
    2/14/2018 3:17 PM Baader DSLR-2" Filter Holder M48/SP54
    I want to get your 2" filter and place it in my imaging chain with standard 48mm 0.75mm threads on both sides (one male one female). It looks like your 2" filter uses 48mm threads with nonstandard pitches, so I need to buy adapters but I cannot figure out which adapters to get. Thanks!

    Answer rated: -29
    As previously answered on another question, our so-called "nonstandard pitch" differs only very slightly to allow adaptation of Baader filters to the many different pitch variations. So we are very confident that our filters will fit into your image chain.
    Answer by: Baader Web Team (Admin) on Feb 14, 2018 3:23:00 PM
  329. Rated: 11
    7/7/2022 10:05 PM M54 Fine-Adjustment rings (0,3 / 0,5 / 1 mm) - Aluminium
    Is the M54 fine adjustment rings threaded?

    Answer rated: -7
    These rings are cylindrical without a thread. They are meant to fit in between to M54 thread connections for finetuning the optical length. The inner diameter is slightly larger than M54
    Answer by: Baader Web Team (Admin) on Jul 8, 2022 8:51:00 AM
  330. Rated: 11
    2/27/2022 4:28 AM 17,5 mm Morpheus® 76° widefield eyepiece
    I own a new Stellarvue SVX 130T f7 refractor. I am interested in your Morpheus eyepiece lineup. Will these eyepieces be able to produce a flat field of view with sharp stars from edge to edge in an f7 instrument? I think the Morpheus eyepieces are brilliantly engineered. Thanks. Davis.

    Answer rated: -3
    You will have a phantastic view with sharp stars across the field with the combination of Morpheus eyepieces together with your telescope!
    Answer by: Baader Web Team (Admin) on Feb 28, 2022 9:22:00 AM
  331. Rated: 11
    1/8/2021 10:07 PM Baader FlipMirror II Star Diagonal
    I have a Vixen VMC-200L, Vixen 50mm 2" ocular (with Baader skyglow filter), a ZWO ASI183MC camera, and a ZWO ASI120MC-S camera. Along with the Baader Flip Mirror Diagonal, what components do I need to mount the ocular on the top port, the ASI183 camera on the axial port, and the ASI120 camera as an off-axis guider?

    Answer rated: 20
    This depends on the field stop position of the eyepiece and the backfocus of the cameras.
    For the eyepiece on the upper port, we'd recommend
    #2956242 M42i x 0,75-ClickLock (Astro T-2 System) with a height of 36,6mm.
    Please note that the upper port is limited by the diameter of the T-2-thread, so it is a little bit less than 40mm, and there will be some vignetting with 2"-eyepieces with long focal lengths.
    For the camera, you can use e.g.
    #2956220 SC / HD (2")-Clicklock (5" SC, 6" SC/HD, 8" SC/HD and 9¼" SC)
    with a height of 47mm.
    If I understand the description of ZWO correctly, the larger camera has 6mm of backfocus when used with either T-2 or a 2" nosepiece; the smaller camera should be similar and also include a 2" nosepiece (if doesn't, but has got a female T-thread, you can use Baader 2" nosepiece to T-2 / M48 # 2408150; if it has got only a 1.25" nosepiece, there is Baader Pushfix Reducer 2" to 1¼" # 2408151 with only 1mm of optical height).

    We'd recommend to use these two clamps and to determine the focus position of the eyepiece. You shouldn't need to insert it completely into upper port, as that clamp is shorter. If desired, you can add T-2-extensions later to get to the right distance. Or you focus your telescope now with the cameras to find out how much the focus differs between eyepiece and cameras, then you can determine the required T-2-extensions in advance.

    For connection to the telescope, we'd need to know the available thread at the telescope. T-2 or M48 work out of the box, for other threads, an adapter would be required.

    For further information, please also take a look at this blog post: https://www.baader-planetarium.com/en/blog/using-the-flipmirror-the-correct-working-distances/
    Answer by: Baader Web Team (Admin) on Jan 11, 2021 3:54:00 PM
  332. Rated: 11
    11/21/2022 4:41 PM Fluorite Flatfield Converter (FFC) / 3x-8x
    Where can I learn more about the "M 68-System" and how I can connect the FFC via threaded connection to my telescope? Thanks

    Answer rated: 6
    Our M68 adapter system is our solution for high-end adaptation needs, offering a large clear aperture and a very strong connection via its M68x1.0 thread.

    You can find our selection of M68 adapters here:
    https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/m68-zeiss.html

    To connect the Baader FFC to the M68 ecosystem, you can use our Four-In-One adapter:
    https://www.baader-planetarium.com/en/baader-four-in-one-adapter-m68t-2m68.html

    You have the option of mounting the lens infront or after the Four-In-One adapter.
    The mounting option infront (telescope-side) is easier to calculate, if you have the space to house the FFC.

    Reason is that you can proceed calculating from the M68 adapter thread beeing one reference surface only.
    Otherwise, you would need to consider where the FFC ends within the following M68 adapters.
    Answer by: Baader Web Team (Admin) on Nov 24, 2022 8:58:00 AM
  333. Rated: 11
    11/17/2019 8:53 PM BCF 2 - DSLR Astro Conversion Filter for Canon Full-Format Cameras (all latest Models)
    If I modify my dslr with a baader bcf filter inside the sensor, the photos after modification will be only red without any blue or green?Or just more red plus blue and green as before?

    Answer rated: 13
    The Baader BCF is more open in the red part of the spectrum, means all other colours pass the filter plus some more red. This gives "normal" (daylight) photos a pink touch that you can correct in image processing
    Answer by: Baader Web Team (Admin) on Nov 18, 2019 8:48:00 AM
  334. Rated: 11
    7/18/2020 8:27 PM BDSF: OD 3.8 Baader Digital Solar Filter (80mm - 280mm)
    I have a Canon 600mm f/4 IS lens with a cap that has an outer diameter of 184mm/7.25 inches do you have a BDSF: OD 3.8 Baader Digital Solar Filter that will fit?

    Answer rated: 14
    We have a Baader Solar Filter that fits your device. Please check out our ASTF 160mm Solar Filter:
    https://www.baader-planetarium.com/en/solar-observation/baader-solar-filter/astf-astrosolar-telescope-filter-od-5.0-(80mm---280mm).html#425=867

    Please note that we recommended the Filter with AstroSolar Safety Film OD 5.0
    The Baader Digital Solar Filter OD 3.8 is only recommended eyepiece Projection (afocal photography) and lucky imaging with video cameras. We explain the differences in details in the first FAQ on our AstroSolar website. Read more here:

    https://astrosolar.com/en/faqs/
    Answer by: Baader Web Team (Admin) on Jul 20, 2020 9:23:00 AM
  335. Rated: 11
    1/23/2021 2:35 AM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    I cannot get backfocus.
    I am using an Orion Thin Off Axis Guider and a Full Frame Canon 6D Markii.
    Your specs require the MPCC to be converted to M48 and for full frame the back spacing needs to be 57.5mm. But there is no adapter available on the market to get the extra 2.0-2.5mm I need.
    Canon SLR 44mm
    Orion Thin Guider 11mm
    Scope is a GSO 200mm F4 Newtonian.
    I have tried it using the M42 method with severe vignetting due to it not being full aperature and full frame camera in use.
    I am out of ideas and would appreciate your help.

    Answer rated: 4
    You can use Reducing piece M48a / T-2i # 2958553 with an optical length of 0,7mm to mount the M48-ring directly to the MPCC. That's good enough, as the distance should be 55+/-1mm, and that close to the MPCC, vignetting is no problem, as the lens is smaller, anyway.
    Answer by: Baader Web Team (Admin) on Jan 25, 2021 9:17:00 AM
  336. Rated: 11
    12/9/2022 1:40 AM Baader FlipMirror II Star Diagonal
    I already own a Celestron C6 SC XLT with a much appreciated Hyperion Mark IV zoom. I would like to replace the stock diagonal with a Baader FlipMirror II.

    The idea would be to

    - permanently connect the FlipMirror II to the telescope using the "Baader SCT T Adaptor Ultra Short 10mm Optical Length"
    The space available to rotate the flipmirror for screwing it in seems not enough on the C6, but I have seen that it is possible to screw it in without the telescope focus knob getting in the way if the rubber jacket of the knob is temporarily removed.
    - connect a DSLR to the straight FlipMirror output (I already have a low profile Canon T2 adapter)
    - use my Hyperion Zoom MkIV on the angled top output, either directly screwed in or through a baader 2" clicklock since I might use other Eyepieces

    Besides flipmirror, SCT adapter and clicklock what other components do I need to have for having the DSLR and the eyepieces at the same focal distance from the scope?

    Thanks for your advice

    Answer rated: 3
    The distance between the field stop ofthe eyepiece and the thread on the Flip Mirror should be similar to that of the sensor to the thread of the Flip Mirror. For a DSLR with a standard T-ring, it is 55mm (with your low-profile adapter, it is a little bit less).
    The best option would be
    Baader Focusing Eyepiece Holder 1¼" / T-2 (T-2 part #08A) # 2458125 - length 29-35mm
    Baader VariLock 29, lockable T-2 ExtensionTube 20-29mm with spanner tool (T-2 part #25Y) # 2956929
    With this, you can set any distance between 49mm and 64mm, which should work with your DSLR. A standard T-ring may be better than a low-profile one, but it should be fine for most eyepieces.
    Then, you just need to focus with your DSLR and set the VariLock to a length where can focus all eyepieces with the fine focus of the eyepiece clamp.
    Answer by: Baader Web Team (Admin) on Dec 9, 2022 12:01:00 PM
  337. Rated: 11
    8/14/2019 11:17 PM 14 mm Morpheus® 76° widefield eyepiece
    Can I remove the 1.25" piece from the 2" section? This is on the Morpheus 14mm eyepiece.

    Answer rated: 5
    No, the 1.25" barrel can't be removed. Only the Hyperion eyepieces can be taken apart there without voiding the warranty; the Morpheus are not designed to be taken apart and can only be used at their specified focal length.

    If you want to use 2" filters, you need to use an adapter like the Pushfix # 2408151 which can also be installed permanently on the eyepieceif you want to mount it farther away from the focuser.
    Answer by: Baader Web Team (Admin) on Aug 19, 2019 9:32:00 AM
  338. Rated: 11
    1/25/2021 10:56 AM Baader 2" Cool-Ceramic Safety Herschel Prism (Visual / Photographic)
    I will use the prism with a 1.25 inch clicklock and have bought the 2 inch to T-2 adapter to do so. How can I unscrew the 3.0 ND filter from the threaded extension? It seems to be stuck or glued to it and I cannot apply more force without risking damage to. The solar continuum filter unthreaded easily.

    Answer rated: 1
    The filter is not glued in, but unfortunately, sometimes threads get stuck. This may happen also with other adapters. They get even harder to unscrew when you grab them at the side, which can change their shape slightly.
    We recommend to put them flat on a rubber mat (e.g. sponge rubber) and put another piece of rubber on top of it. Then put your flat hand on the upper rubber mat and rotate it - this way, the pressure is distributed on the whole filter cell, and the the two parts shut come off easily.
    Answer by: Baader Web Team (Admin) on Jan 25, 2021 12:06:00 PM
  339. Rated: 11
    4/4/2022 5:01 PM ASBF: AstroSolar Binocular Filter OD 5.0 (50mm - 100mm)
    What is the full diameter, including the housing for the ASBF 60 Filter

    Answer rated: 5
    The outer diameter of the housing is 120mm. The cross-section on the shortened side is 100,5 mm
    Answer by: Baader Web Team (Admin) on Apr 5, 2022 8:07:00 AM
  340. Rated: 11
    3/18/2019 10:15 AM Baader DSLR-2" Filter Holder M48/SP54
    Could you please tell me what products I would need to fit a 2" filter to my Nikon P1000 camera whose lens has may carry a 77 mm filter? Which is also the best solar filter for this camera for taking picture of the sun?

    Answer rated: 5
    You will need following two rings to step-up M77 from the filter-holder
    https://www.baader-planetarium.com/en/baader-hyperion-dt-ring-sp54m62-for-dtadapter-iiandiii-and-hyperion-eyepieces.html
    https://www.baader-planetarium.com/en/baader-hyperion-stepper-ring-m62-onto-m77.html

    Please take a look at this table to find out what AstroSolar filter fits best on your lense:
    https://astrosolar.com/en/download/clamping-range-baader-solar-filters-inner-outer/
    More about solar filters are here: https://astrosolar.com/en/
    Answer by: Baader Web Team (Admin) on Mar 18, 2019 3:40:00 PM
  341. Rated: 11
    12/19/2022 12:31 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Ich habe eine Celestron Evolution C8 und ich möchte das ursprüngliche "1,25 inch visual back" etwas Stärkeres ersetzen, aber ich möchte meine 1,25ich diagonale behalten, was würden Sie mir empfehle

    Answer rated: -4
    Die ClickLock 1,25" https://www.baader-planetarium.com/de/t-adapter-(bta)-f%C3%BCr-sc--und-mak-teleskope-(t-2-bauteil-21).html ist eine hervorragende Klemme welche die komplette Hülse klemmt und nicht nur (wie bei der Original Celestron Klemme) an einer Stelle der Hülse mit einer Schraube hält. Um die ClickLock montieren zu können benötigen Sie zusätzlich einen 2"/T-2 Adapter. https://www.baader-planetarium.com/de/clicklock-1%C2%BCandquot--t-2-okularklemme.html
    Answer by: Baader Web Team (Admin) on Dec 19, 2022 12:35:00 PM
  342. Rated: 11
    8/25/2022 2:42 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Could you let me know how tall the Baader 2" ClickLock 37 mm extension (#2956237) is please? I would need to know the total length, not just the optical path.

    Thanks

    Answer rated: -18
    The total height of ClickLock body + barrel is 60 mm (without dustcaps).
    Answer by: Baader Web Team (Admin) on Aug 26, 2022 8:08:00 AM
  343. Rated: 11
    2/2/2021 7:54 PM Research Grade H-alpha 0.4x Telecompressor 2" for Solar Spectrum
    What is the corrected field diameter when used with 4x telecentric?
    Does the corrected field diameter shrink if the reducer is mounted at say 30 mm from the etalon output? If yes, how much, approximately?

    Answer rated: 6
    As the chip moves away from the reducer, the usable area gets smaller dramatically much faster. Unfortunately, we don't have tables for this.
    Changing the distance between the TZ and the reducer should have relatively little effect. The design is calculated for about 50mm distance. +-10mm should have no effect.
    Answer by: Baader Web Team (Admin) on Feb 10, 2021 10:43:00 AM
  344. Rated: 11
    11/28/2018 1:22 PM ASSF: AstroSolar Spotting Scope Filter OD 5.0 (50mm - 150mm)
    Can I use AstroSolar films at deep temperatures

    Answer rated: 18
    For exactly this purpose we do supply the ASTF-series of mounted solar filters. The fastening rim on which the film is affixed to has the same expansion coefficient as the film itself. and that very ring is free-floating in the cell that mounts onto the telescope tube.

    Hence there is no stress build-up extended onto the film as it shrinks with temperature variation.

    The film itself will not be harmed by temperatures between -50°C up to +50°C. Below the film will become stiff and further below (- 100°C) even brittle. Above 50°C the adhesive that fastens the film onto its mounting-ring may start to become soft - in case that temperature persists for longer than 24 hours.
    Answer by: Baader Web Team (Admin) on Nov 28, 2018 1:24:00 PM
  345. Rated: 11
    8/16/2020 1:48 PM Baader MaxBright® II Binoviewer with case
    I have a Bresser AR127L telescope, I just went ahead a minute again and bought a MaxBright II binoviewer without accessories. So from a newbie question here, what other accessories and eye piece do I need to set it up on my Bresser telescope. Can I use a 2” eye piece as well instead of the 1,25”?. Sorry, am clueless on Binoviewer.

    Answer rated: 16
    Please take a look at the manual of the MaxBright binoviewer, where most of your questions are answered. It is in the download section of the proct website. Take a special look at the section about how to determine the back focus of your telescope, which tells you if you need a glasspath corrector to reach focus, anf if you can use your existing star diagonal or if it is too long. This determines if you need a 1.25" T-2 nosepiece, or if you need a very short star diagonal with T-2-threads instead of a long eyepiece clamp.

    You can only use 1.25" eyepieces, although our Hyperion Aspheric 2" eyepieces come with adapter so that they can be used as 1.25" eyepieces - if there is sufficient back focus.

    We always recommend to measure your available backfocus first (with your existing star diagonal, but if possible also without it), so that the necessay adaption can be found - often, there are cheaper sets availableht an if you have to buy every item seperately.
    Answer by: Baader Web Team (Admin) on Aug 17, 2020 2:05:00 PM
  346. Rated: 11
    11/30/2017 2:43 PM Baader Ultra-Narrowband H-alpha 3,5nm Filter
    Are you developing a 36mm unmounted version of this filter?

    Answer rated: 1
    Currently there is no production of 36mm running but this may happen in future. Unfortunately we cannot predict when.
    Answer by: Baader Web Team (Admin) on Nov 30, 2017 3:29:00 PM
  347. Rated: 11
    1/11/2022 9:35 PM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    I would like to use a coma-corrector, for visual, on my f4.5 newton. Due to its price and performance, i find the mpcc mklll very interesting. So my question is: Is it possible to make the hyperion eyepieces parfocal - so i only have to adjust the coma corrector once ? I would like to use the 24mm, 13mm and 5mm hyperions. Regards Asbjørn Skou

    Answer rated: -1
    Most of the Hyperion eyepieces are almost parfocal, although some differ a little bit - you can find the dimensions in the Download-tab of the product websites of the eyepieces. You can make them parfocal with a either a self-made, 3d-printed spacer ring which fits around the 1.25"-nosepiece, or with our Stop Ring 1¼" (T-2 part #30) # 1905131.
    If you should need a longer 1.25" nosepiece, there is also Baader 1¼" - 31.8mm nosepiece extension with 1¼" filter thread on both sides (T-2 part #05) # 1905130 - but for the few millimeter of difference with the Hyperions, it should not be necessary.
    Answer by: Baader Web Team (Admin) on Jan 12, 2022 1:32:00 PM
  348. Rated: 11
    8/20/2020 8:55 AM Baader 24mm Hyperion 68° Eyepiece - Non Variable
    I am looking at the Hyperion range eyepieces. Will these be compatible for the Orion 10" f/3.9 Newtonian Astrograph Reflector Telescope?

    Answer rated: 12
    You can use them on any telescope with 1.25" or 2" eyepiece clamp. However, on such a fast telescope, we'd highly recommend the use of a coma corrector like the MPCC in its version for visual and photographic use: https://www.baader-planetarium.com/en/2%22-mpcc-mark-iii-(multi-purpose-coma-corrector-for-newtons).html#574=926 Otherwise, the eyepiece will show the coma of the telescope.

    In the manual of the MPCC in the download section of its product site, we describe the recommended distances for eyepieces.
    Answer by: Baader Web Team (Admin) on Aug 20, 2020 9:03:00 AM
  349. Rated: 11
    12/20/2019 4:58 PM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    I have a Celestron Nexstar 8se and just bought the Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2") with the 2.25x barlow. I also have a panasonic P&S ZS-100 camera, what adapter can I buy? Many thanks!

    Answer rated: 20
    As this camera doesn't have a filter thread, the best option would be some camera stage like the MicroStage II:
    https://www.baader-planetarium.com/en/microstage-ii-digiscoping-camera-adapter.html
    Answer by: Baader Web Team (Admin) on Jan 7, 2020 11:24:00 AM
  350. Rated: 11
    2/26/2021 12:32 PM Baader Solar Continuum Filter (540nm)
    Does the Solar Continuum filter block or transmit Infra red or UV?

    Answer rated: -6
    This filter blocks everything from 300 nm up to 1200 nm - except for a "clean" solar continuum-area at 540 nm
    Answer by: Baader Web Team (Admin) on Feb 26, 2021 3:12:00 PM
  351. Rated: 11
    8/26/2020 2:58 AM Baader double-balancing plate-set with 3" plate, V-clamp and Stronghold
    Whats the max load allowed on the plate on a side by side mounting ??

    Answer rated: -5
    We would recommend a load of approximately 20kg max. ~7kg on the stronghold and ~13kg on the V-clamp
    Answer by: Baader Web Team (Admin) on Sep 2, 2020 2:04:00 PM
  352. Rated: 11
    5/28/2020 10:59 PM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    I am interested on 2" MPCC Mark III Coma corrector, but I have a Sony Alpha 900 Full Frame camera. Even though I understand I can use it "as it comes" with some vignetting, I wonder what else would I need in order to fit it not with the normal T2 but with the 48mm option to get (supposely) full coverage.
    I have seen that the T2 adapter I already have include something very similar to this (https://www.baader-planetarium.com/en/baader-m48-spacer-ring-for-mpcc-iii--protective-eos-t-ring.html), so I wonder if I can just use the T2 adapter I have without that, or if I would need a different one, for example "Baader Wide-T-Ring Sony Alpha and Minolta Maxxum with D52i to T-2 and S52" (not sure if this is the one I have)
    I am afraid once I have ordered the corrector I might end up needing something else...

    Answer rated: 14
    This will probably not work, because the diameters of the insets of T-rings are not standardized – the adapter ring will probably not fit into your existing T-ring.

    Vignetting which is caused by the T-thread (M42x0.75) can be removed with a Wide-T-Ring, but it may also be caused by the camera bayonet, so please check if a wider T-ring will actually be of use, or if the camera is the problem.

    Please also note that Sony uses two bayonets, one is compatible with Minolta and the other one is the E-bayonet.
    Answer by: Baader Web Team (Admin) on May 29, 2020 10:49:00 AM
  353. Rated: 11
    10/4/2022 9:00 PM Carl Zeiss 1¼" Abbe Barlow lens 2x
    Can you please explain what the big ring that turns does? (the ring below the click-lock) should I clamp that down?

    Answer rated: 6
    The Barlow uses Baader ClickLock Eyepiece Clamp 1¼" with built in diopter-adjustment (T-2 part #08) # 2458100 as eyepiece clamp. The upper, smaller ring can be screwed up or down for fine adjustment of the focus, or it can be removed so that you can access a T-2-thread.
    The wider ring (with tha Baader-logo on the side) is the actual clamp which locks the eyepiece in place.
    When you open or close the clicklock, both rings move as one part.
    Answer by: Baader Web Team (Admin) on Oct 5, 2022 3:59:00 PM
  354. Rated: 11
    12/2/2020 9:05 AM Baader Hyperion 68° Eyepiece Set (Starter)
    Does these eyepieces working good on a fast telescope? Like f4.4 or not?

    Answer rated: 2
    With such a fast telescope, you should always use a coma corrector like the MPCC #2458403: Visual Version (V-1 Set), then they work fine.
    The eyepieces do not correct coma and would show the coma produced by the teelscope.
    Answer by: Baader Web Team (Admin) on Dec 2, 2020 9:50:00 AM
  355. Rated: 11
    1/28/2022 9:52 AM Baader H-alpha 35nm CCD Filter
    I live in a polluted area and I own a 2’’ Baader 35nm H-alpha (f10 to f2.8) and I’d like to put my filter in front of my 20mm f1.8 lens attached to a Full Frame camera. I have a 35mm 1.8 too.
    Obviously the filter will cause a heavy vignette (ok for me), but I need to know how much the filter efficiency changes according to the angle of incidence of the light because I’m using a wide-angle lens (for example wider window band and/or shift). Is there a more appropriate filter to use in front of the lens?

    Answer rated: 13
    When you are using the filter in front of a lens, it is the right filter choice with full efficiency.. Because it doesn´t make any difference if there is an f/4 or f/1,8 lens behind the filter. In contrary, a Highspeed filter would be the wrong choice in front of your f/1.8 lens, but the right choice behind such a fast lens. We only offer the filter models you see on our website, there are no special models for camera lenses like yours.
    Answer by: Baader Web Team (Admin) on Jan 28, 2022 10:17:00 AM
  356. Rated: 10
    5/25/2019 1:47 PM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    Can it work with Canon Eos M cameras?

    Answer rated: 49
    Yes, it works with all kinds of EOS cameras. Please note that you need an additional 40mm T-2 extension to compensate the shorter way to the sensor in the camera housing
    Answer by: Baader Web Team (Admin) on May 27, 2019 9:26:00 AM
  357. Rated: 10
    6/15/2020 11:46 PM Baader Wide-T-Ring Nikon Z (for Nikon Z bajonet) with D52i to T-2 and S52
    What do I need to attach a Nikon Z6 camera to a Celestron HD 14" telescope? Sorry I find your web site very confusing. Thanks for your help

    Answer rated: 0
    The Celestron C14 EdgeHD has a back focus of 146,05mm and needs a T-adapter like this (US Item #93622)::
    https://www.celestron.de/ce_de/t-adapter-48mm-edgehd-925-11-14.html
    We recommend this bigger M48 adapter instead of the smaller with T2 thread M42x0,75 because your camera has a full format sensor. From this adapter you have 55mm left which should be fine for DSLR cameras. But you have a mirrorless camera with 16mm back focus plus this Rings:
    https://www.baader-planetarium.com/en/baader-wide-t-ring-nikon-z-with-d52i-to-t-2-and-s52.html
    https://www.baader-planetarium.com/en/changer-ring-s52--m48.html
    which hight is 8,3mm. So you have a gap of 30,7mm between your camera and DSLR (55-16-8.3) which you can fill with this rings:
    https://www.baader-planetarium.com/en/baader-hyperion-finetuning-ring-28.html
    https://www.baader-planetarium.com/de/m48-fein-abstimmringe-aus-aluminium-(03--05--1-mm).html (2pc of 1mm and 1pc of 0.5mm)
    Answer by: Baader Web Team (Admin) on Jun 16, 2020 9:46:00 AM
  358. Rated: 10
    6/3/2019 4:07 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Wich one is suitable for SW Evostar72ED? Someone says m56x1, someone M54ax1. Thanks

    Answer rated: 42
    For the SkyWatcher EvoStar 72 ED you will need the #2956254 M54a x 1-ClickLock (Skywatcher / Orion) clamp
    Answer by: Baader Web Team (Admin) on Jun 4, 2019 8:38:00 AM
  359. Rated: 10
    3/19/2021 4:23 PM Baader Telescope Flap System (TFS) for PlaneWave CDK's
    I am interested in your telescope flap system for a CDK 20. The product photos on your website show a white shroud inside of the truss tubes. Does the TFS include the shroud or is that purchased separately?

    Answer rated: 0
    The TFS doe NOT include the shroud. Currently we cannot offer the TFS at all due to COVID related production issues, we are very sorry.
    Answer by: Baader Web Team (Admin) on Mar 22, 2021 9:35:00 AM
  360. Rated: 10
    2/15/2022 4:55 PM Baader FlipMirror II Star Diagonal
    What accessories are recommended for achieving 133mm backfocus for Celestron Edge HD 8 with a DSLR (with native 55 mm backfocus when used with a t-ring)?

    Without any adapters, 55mm flip mirror + 55mm backfocus of a DSLR (with t-ring) leaves 23 mm of optical length left. #2958500B for the SCT connection gives me 7mm + 2mm for the T2 adapter shipped with the mirror. I then have 14mm left to connect the DSLR t-ring to the mirror somehow, correct?

    Then if I were to use 2458100 as a focusing eyepiece holder, I'd just need to find T2 extension tubes to achieve the same optical distance to the eyepiece flange, correct?

    Answer rated: 8
    With M48 or T-2, the optical length of the Flip Mrror is 59mm, so the complete length is
    7mm (SC-T-2-adapter) + 59mm (BFM II) + 55mm (DSLR + T-Ring) = 121mm
    so you need to bridge another 12mm.
    This can be done either with a 10mm T-2-extension plus two T-2 Fine-Adjustment rings 1mm (gold) - Aluminium #2457913
    or with
    Baader Variable locking T-2 extension (12-16mm) incl. lock ring (T-2 part #33) # 2958130

    If you place this 12mm extension between telescope and flip mirror, then the distance to the camera sensor is 55mm, and the eyepiece holder on the upper port should also be ca. 55mm long - for eyepieces, where the field stop is located at the connection of nocepiece and eyepiece body (this is common, but not the case for all eyepieces). 2458100 is 32-38mm long, so you need another 20mm - e.g. with Baader VariLock 29, lockable T-2 Extension Tube 20-29mm with spanner tool (T-2 part #25Y) # 2956929.
    Answer by: Baader Web Team (Admin) on Feb 16, 2022 12:30:00 PM
  361. Rated: 10
    3/23/2021 10:41 AM Alan Gee Telecompressor Mark II (T-2 part #20)
    I’m looking for the widest fov out of C8 for visual use. I see you recommend having the UAG for visual use, but concerning using the stock sct-1.25” visual back and 1.25” diagonal wouldn’t the 2” size of the UAG be too big to fit? And the t-2 thread is also useless in this configuration?
    Wouldn’t the original Alan gee be much better fit for such configuration? Considering it sits inside the baffle and the stock visual back is used as the locking screw of it.
    Also, using your 31/36 aspheric, wouldn’t using the original Alan gee allows to screw the eyepiece to the sct thread with the Alan gee In it’s place? And In general , which is more suitable for C8 with/without focal reducer, the 31 or the 36?
    Thanks in advance

    Answer rated: 12
    The main purpose of the UAG is to easily adapt a binoviewer, especially for telescopes upgraded to a 2" eyepiece holder like our 2" ClickLock..

    A telecompressor can't really give you a wider field of view, it only gives you a wider field of view with the same camera sensor. It is usually better to use an eyepiece with a longer focal length and a larger field stop for visual use than to use a telecompressor.

    With a Schmidt-Cassegrain, the inner baffle limits the usable field of view, as it has got a diameter of 37mm. Using a telecompressor behind the baffle (at the back of the telescope, which is the only place where you can put it), it can give you less magnification and a brighter image, but *not* a larger vield of view, as this is limited by the baffle. If you use a telecompressor or an eyepiece with a very large field of view and focal length, there will be vignetting at the edge.

    So, you best option would be a 2" star diagonal combined with a long-focal eyepiece like the Hyperion 36; a telecompressoris only useful if you have a smaller camera sensor (like APS-C or smaller) or use 1.25" eyepieces (like in a binoviewer).

    Please also take a look at this info from Celestron.com:
    I want to use 2 in eyepieces with my SCT and/or Mak. Will there be vignetting from the OTA itself?
    https://www.celestron.com/blogs/knowledgebase/i-want-to-use-2-in-eyepieces-with-my-sct-and-or-mak-will-there-be-vignetting-from-the-ota-itself
    Answer by: Baader Web Team (Admin) on Mar 23, 2021 1:04:00 PM
  362. Rated: 10
    3/24/2021 11:56 PM Baader DSLR-2" Filter Holder M48/SP54
    I want to get your 2" High Speed filters for my Canon 400mm f/2.8 USM L ii prime DSLR lens & to share with my soon coming RASA. The "Canon 52 (Wii)" Drop In filter universal size is 52mm filter size and 48mm thread - Which adapter do I need to adapt to my Canon drop in...and is the full diameter of your 2" high speed filters under 52" (or it won't fit in the drop in casing)?

    Answer rated: -9
    This might work out of the box - our filters do have an external diameter of ca. 50mm and use a thread of about M48x0.75 - the 2" filter thread is not really standardized, so we make our filter threads compatible with as many manufacturers as possible. So, chances are good that they will also fit to Canon. For the UFC, you need the Baader UFC 2" (M48) Filter Slider # 2459112
    The height of the filters without thread is 6mm.
    Answer by: Baader Web Team (Admin) on Mar 29, 2021 11:32:00 AM
  363. Rated: 10
    3/24/2017 12:20 PM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    Do you know if we can use the BDS-SC with the Celestron Edge HD focal reducer for Edge HD 8"?

    Answer rated: -5
    Please see following PDF Document about the 0,7x Celestron Reducer:
    http://www.celestron-deutschland.de/images/files/downloads/521_reduceredgehd80.pdf
    As you can see there is only 105mm back focus left. the BDS SC is at least 93mm long.
    http://www.baader-planetarium.com/de/downloads/dl/file/id/29/product/2856/bds_sc_dimensions_technical_drawing.pdf
    According to this circumstances there is unfortunately not enough back focus left to adapt
    a Camera.
    Answer by: Baader Web Team (Admin) on Mar 27, 2017 9:45:00 AM
  364. Rated: 10
    7/17/2022 7:37 AM Baader Hyperion 68° Eyepiece Set (Complete)
    Hello, do you sell replacement top dust caps? I need one for my 21mm Hyperion Eyepiece, it's the one that measures 45mm inner diameter.

    Answer rated: 13
    We have spare parts available. Please send a mail to support (at) baader-planetarium.de
    Answer by: Baader Web Team (Admin) on Jul 18, 2022 11:09:00 AM
  365. Rated: 10
    11/17/2022 4:49 AM Baader Wide-T-Ring Canon R (for Canon R bajonet) with D52i to T-2 and S52
    I have a canon rp with the baader m48 t ring on and an apertura 72ed with the field flattener and an optolong cls 2" filter on the flattener. How much backfocus do I need and what spacers and adapters should I get?

    Answer rated: -5
    Sorry, we can't give you backfocus information without knowing all the details (e.g. your telescope). Furthermore we only do that for our own products, not if other brands like Optolong are included.
    A good guideline however is our Digiscoping Brochure: https://www.baader-planetarium.com/en/downloads/dl/file/id/444/product/0/digiscoping_camera_adaptations_for_afocal_photography_and_eyepiece_projection.pdf
    Answer by: Baader Web Team (Admin) on Nov 17, 2022 8:33:00 AM
  366. Rated: 10
    4/9/2021 2:34 PM Steeldrive II motor focuser with Controller
    Great product! Is it possible to control the motor directly from an astrophotography software on the PC using the RJ-45 connector and an Ethernet cable (PC => Ethernet => motor), without going though the controller (PC => USB => controller => Ethernet => motor)?

    Answer rated: -4
    Thank you! Unfortunately you cannot connect the motor directly to a PC program, you always need to go through the SteelDrive controller
    Answer by: Baader Web Team (Admin) on Apr 13, 2021 8:20:00 AM
  367. Rated: 10
    7/31/2022 3:45 PM Baader V-Dove Tail Clamp, Diam. 70mm, with one clamp screw
    Hello, the external holes interaxis is 35mm, right?

    Answer rated: -2
    Yes, that is correct. It is exactly 35mm
    Answer by: Baader Web Team (Admin) on Aug 2, 2022 4:35:00 PM
  368. Rated: 10
    9/29/2017 9:28 PM Baader 2" / 90° Astro Amici-Prism with BBHS ® coating
    Is it possible to have the same quality (suitable for hight magnifications) with an erecting capacity ?

    Answer rated: 6
    Keep an eye open. We will soon relese a new batch of 2" Amici Prism with BBHS Coatings.
    Answer by: Baader Web Team (Admin) on Oct 4, 2017 8:29:00 AM
  369. Rated: 10
    5/2/2017 10:18 PM Universal Red Dot Mount RDM
    Can you tell me what are the screw size/threading on top of the base? I want to know if they are 1/4"-20 to fit a standard camera hole. Thanks

    Answer rated: 18
    This is not a 1/4"-thread, but screws with the metric M5-thread fit into the holes.
    Answer by: Baader Web Team (Admin) on May 3, 2017 1:31:00 PM
  370. Rated: 10
    12/6/2022 2:48 PM Baader SunDancer II H-alpha Filter
    I use the Sundancer II with a 100mm F/8. I also have a D-ERF and diaphragm on the front lens. Based on experience, my setup would work better with a 4x telecentric. Will you release such a 4x telecentric for the Sundancer?

    Answer rated: 10
    Yes - we will. Only all production is severely delayed at this time. It may take us until March 23 until this product becomes available.
    Answer by: Baader Web Team (Admin) on Dec 6, 2022 4:12:00 PM
  371. Rated: 10
    8/15/2022 4:56 PM Fluorite Flatfield Converter (FFC) / 3x-8x
    Can this FFC be used with a SCT such as a Celestron C6 or C8 for imaging in at T2 imaging train?

    Answer rated: -18
    Yes this will work
    Answer by: Baader Web Team (Admin) on Aug 16, 2022 8:39:00 AM
  372. Rated: 10
    12/11/2022 8:37 AM VIP 2x modular barlow lens, visual and photographic
    I would like to use the vip modular barlow in 3x mode on a 120/1200:

    At 3x will the 26mm 70° and 35mm 70° eyepieces have problems?

    Will the 3x image be degraded a lot?

    Will an additional 64mm spacer be needed to reach 3x?

    Thank you

    Answer rated: -9
    The Barlow works fine for magnification factors between 2x and 3x, so it shouldn't have problems with your eyepieces, too. For 3x magnification, you need another 64mm of T-2-extensions. If you don't want to use a VariLock to achieve the perfect distance, you can come quite close with removing one 15mm extension and adding two 40mm extensions, giving you a working distance of 129mm.
    Answer by: Baader Web Team (Admin) on Dec 12, 2022 10:18:00 AM
  373. Rated: 10
    5/25/2018 5:17 PM Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp
    Does the diagonal have an eyepiece stop?

    Answer rated: 10
    No - the ClickLock-receptor is designed to accept eyepieces up to 35mm sleeve length plus 8mm for an eyepiece filter and stay flush with the full length of the receptor. The ClickLock was designed to stay as short as possible to not eat up too much backfocus.

    You could have the eyepiece sleeve plus mounted filter reach up to 5 mm into the housing without touching the mirror. We did allow this to happen in order to provide maximum depth for eyepieces.
    Answer by: Baader Web Team (Admin) on May 30, 2018 3:16:00 PM
  374. Rated: 10
    11/4/2020 3:19 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Which Baaader 2" ClickLock should I choose for my SkyWatcher Mak-Newtonian 190mm reflector?

    Answer rated: -1
    SkyWatcher uses several threads, so we'd have to ask you to check the thread at your specific telescope as we don't have it here.
    The typical SkyWatcher-threads are:
    #2956251 M54a x 0,75-2" (TS-Optics / SkyWatcher)
    #2956254 M54a x 1-ClickLock (Skywatcher / Orion)
    #2956256 M56i x 1-ClickLock (Skywatcher / Celestron)
    #2956257 S57-ClickLock (Skywatcher / Celestron)
    #2956274 M74i x 1-ClickLock (Skywatcher Esprit, TS-Optics, Omegon)

    You can find a description on how to measure a thread here:
    https://www.baader-planetarium.com/en/blog/clicklock-clamp-for-your-telescope/
    Answer by: Baader Web Team (Admin) on Nov 5, 2020 8:32:00 AM
  375. Rated: 10
    3/31/2023 3:04 PM Baader FlipMirror II Star Diagonal
    I have a Williams Optics FLT-132 and a ZWO ASI183MC Pro CMOS astro camera. Can I attach the astro camera (which will also use ASIAIR for GoTo function) to the back of the flip mirror and then an eye piece to the top of the flip mirror, to simultaneously have the ability to take images of an object as well as see it visually in real time through the eyepiece?

    Answer rated: 6
    Simultaniously taking photos and observe will not work. You can do either/or, not both at the same time. Because the light either hits the mirror and goes to the eyepiece - or it goes straight through the Flip Mirror housing and hit the sensor of your camera.
    Answer by: Baader Web Team (Admin) on Mar 31, 2023 3:49:00 PM
  376. Rated: 10
    1/5/2022 5:41 PM Baader UHC-S / L-Booster-Filter
    What do I do if I have both light pollution and chromatic abberation?

    Won't two appropriate filters work against each other?

    Answer rated: -1
    This depends on the characteristics of the two individual filters.
    You may want to take a look at our Baader Semi APO Filter, which combines a colour correcting filter for achromats with a Neodymium anti-lipghtpollution filter.
    Answer by: Baader Web Team (Admin) on Jan 7, 2022 12:23:00 PM
  377. Rated: 10
    2/15/2021 2:12 PM Bundle: Hyperion Universal Zoom Mark IV with Hyperion-Barlow 2.25x (8-24mm / 3.6-10.7mm)
    Will I be able to use Hyperion-Barlow 2,25 with the eyepieces from other manufactures and Hyperion Universal Zoom Mark IV with other barrows?

    Answer rated: 11
    With the included adapter A, you can use it with every eyepiece which has got a 1.25" filter thread. Please note that the length of the 1.25" nose pieces is not standardised, so that the actual magnification factor may vary slightly.

    You can use every barlow lens with the Hyperion Zoom, no problem.
    Answer by: Baader Web Team (Admin) on Feb 16, 2021 9:20:00 AM
  378. Rated: 10
    11/15/2020 4:08 AM Baader UV/IR Cut / L-Filter
    Can this be used with M48 extension tubes e.g. when getting a particular spacing and including UV/IR cut filter?

    How thick is the filter excluding the male thread e.g. 8mm or 10mm?

    When calculating thickness how much thickness can be subtracted e.g. filter is 2mm or 3mm thick and light path is reduced by a percentage of this.

    As an example, I have an 30mm M48 extension tube. If I include this filter, how much path length does the filter take e.g. I also require a 20mm M48 to make an equivalent path length.

    I have a ZWO camera and a ZWO T2 - M48 adapter with zero path length. I plan to screw this adapter into the UV/IR filter (how deep is the female thread) and attach this to my camera's T2 male thread.

    Simon

    Answer rated: 2
    The filter cell is cmopatible with M48 extensions, but it is not the same thread, as there are various 2" filter threads, and we have designed our filter cells to work with most eyepieces. So, it will work, but we wouldn't recommend it for highest payloads, and please check how good it fits.

    Most of our filters use low-profile filter cells with 6mm height (excluding the threads), the higher 8mm filter cells can mostly be found on older second-hand filters.

    The filter glass adds approximately 1/3 of its thickness to the optical path. So, a 2mm filter will move the focus ca. 0.66mm outwards.
    Answer by: Baader Web Team (Admin) on Nov 16, 2020 11:37:00 AM
  379. Rated: 10
    9/18/2021 11:03 AM Baader 3.5 / 4nm f/2 Ultra-Highspeed Filter-Set – CMOS-optimized (H-alpha / O-III / S-II)
    I'am using de 2" Ultra High Speed filters Ha, SII en OIII for my C14 Hyperstar. Can you tell me which side of the filter should point to the camera? Or does this not matter.

    Answer rated: 21
    In mounted form the male thread must point towards the camera. The filter is already mounted in the cell in the correct way to achieve this.
    Answer by: Baader Web Team (Admin) on Sep 21, 2021 9:23:00 AM
  380. Rated: 10
    12/1/2018 2:30 PM Baader Guidescope rings BP I - 60-120mm
    Hi there,
    Would a pair of Baader rings BP I - 60-120mm handle a refractor and ccd weighing at 6.5kg safely?

    Many thanks,

    Paul

    Answer rated: -8
    This will work!
    Answer by: Baader Web Team (Admin) on Dec 3, 2018 2:16:00 PM
  381. Rated: 10
    9/22/2021 6:34 AM Adapter M68i to M63a (Feathertouch 2.5", TS-Optics)
    Will this M68 to M63 adapter work with the telescope side of the 2” ultra low profile M68/M60 eyepiece clamp? (so that the 2” ultra low profile clamp can then be attached to a M63x1mm female threaded telescope draw tube)

    Answer rated: 15
    Unfortunately this won't work because the M60 thread of the 2"/M68 Ultra Short clamp #2458196 wont fit into the 58mm clear diameter of the M63a/M68i adapter. It will work in combination with a 7.5mm M68 extension #2458212 in between. Alternatively you could of course also remove the M60 thread on a lathe.
    Answer by: Baader Web Team (Admin) on Sep 22, 2021 4:26:00 PM
  382. Rated: 10
    9/28/2021 6:19 AM BCF 2 - DSLR Astro Conversion Filter for Canon Full-Format Cameras (all latest Models)
    Is this filter compatible with canon mirrorless cameras? (Eg; Canon R6)

    Answer rated: 5
    No, it is not compatible
    Answer by: Baader Web Team (Admin) on Oct 5, 2021 8:42:00 AM
  383. Rated: 10
    1/28/2017 2:27 PM Baader ClickLock Eyepiece Clamp 1¼" with built in diopter-adjustment (T-2 part #08)
    Which clickstop adapters are suitable to upgrade mark v bino eyepiece holders?

    Answer rated: -2
    The Clicklocks work similar to our #2458100, but they are not the same, and you can not replace them yourself. The Clicklock for the right and for the left eyepiece move in opposite directions, and much mor important: It is tricky to mount the eyepiece clamps perfectly adjusted and aligned. This is not possible to do with simple means, so we do not offer the parts needed to do it on your own. The chances are very high that you will see double images if you replace the eyepiece clamps in your own.

    But we can upgrade the binos in our optical lab, so that they will not lose their collimation. Please use the contact form at the bottom of the page to send us an email; we cannot offer this service in our webshop.
    Answer by: Baader Web Team (Admin) on Jan 30, 2017 11:16:00 AM
  384. Rated: 10
    10/4/2022 10:51 PM Baader 7.5nm Solar Continuum Filter (540nm)
    I have the Baader Solar Continuum (part# 2458390) and Baader UVIR Cut CMOS (part# 2961570) filters. Would the Baader Solar Continuum (part# 2961580) make a noticeable
    difference ?
    The spec sheet for both Continuum filters show the same transmission ranges of 535nm - 545nm.

    Thanks,
    Philippe

    Answer rated: 5
    The new 7.5nm Solar Continuum filter should make a noticeable difference. Please read this test review: https://www.baader-planetarium.com/en/blog/testreview-baader-solar-continuum-filter-revisited-now-with-fwhm-75nm/
    The transmission range was a copy & paste mistake from the old 10nm filter and has been corrected, thanks for noticing.
    Answer by: Baader Web Team (Admin) on Oct 5, 2022 1:16:00 PM
  385. Rated: 10
    5/31/2020 6:26 PM Telecentric System TZ-4 (4x focal length)
    Hi, I'm thinking of buying the Telecentric System TZ-4 (or possibly a TZ-3) where my telescope is a Lunt 100mm H-alpha Double-Stacked. Would you also recommend that I purchase the M68 Tele-Compendium? In truth, I'm not entirely sure of the purpose of the M68 other than to provide the necessary tube extensions to ensure the TZ-4 reaches focus.
    Many thanks for your help.

    Answer rated: 3
    This depends on the weight which you are going to attach to the Telecentric.

    The TZ4 provides a T-thread on the camera side and a 2" nosepiece on the telecope side. If this connection is strong enough to keep your accessories in place without flexing, you don't need the M68 Telecompedium. But a simple eyepiece clamp may be to small for a long adapter system like an H-alpha filter with a binoviewer or a heavy camera, so to avoid flexure, there is the M68-system, which can be attached to the focuser with a screw connection (if the focuser provides the matching threads). Then, flexing can only be caused by the focuser – and those with M68-threads are usually designed for heavy equipment.

    If you have problems with flexing, you should give the Telecompendium a try.
    Answer by: Baader Web Team (Admin) on Jun 3, 2020 8:16:00 AM
  386. Rated: 10
    12/5/2020 6:48 PM Baader Classic W Rubber Eyecap with folding wing
    I've recently bought zoom eyepieces baader 8/24 for my bino but i can't put in place the eyecup, could you help me please?
    Thanks.

    Answer rated: 5
    For the Hyperion Zoom, you need Baader winged rubber-eyecup 43/44 (Zoom-version) # 2454654, shich is also included with the eyepiece.
    You need to unscrew the 2" wide pre-installed eyecup (either clockwise or counter-clockwise, just try it), then you can access the M43-thread.
    Answer by: Baader Web Team (Admin) on Dec 7, 2020 10:55:00 AM
  387. Rated: 10
    6/8/2022 12:57 PM Baader Multipurpose Finder Bracket MQR IV 9x60 finder (max diameter 72mm)
    I have heard that you maybe planning to discontinue this item. If true, would there be a replacement already lined up?

    Answer rated: -1
    We have not heard this rumor - and are not planning to discontinue this item.
    Answer by: Baader Web Team (Admin) on Jun 8, 2022 2:11:00 PM
  388. Rated: 10
    8/2/2018 11:30 PM Baader ClickLock Eyepiece Clamp 1¼" with built in diopter-adjustment (T-2 part #08)
    Dear Baader, can I use this clicklock to fine focus with a telescope schmidt/cassegrain?

    Answer rated: -12
    Its a very fine focusing method, very slow, but yes - it will work
    Answer by: Baader Web Team (Admin) on Aug 3, 2018 3:53:00 PM
  389. Rated: 9
    10/27/2022 1:11 AM Steeldrive II motor focuser with Controller
    Can this be fitted to a FeatherTouch focuser?

    Answer rated: -1
    The SteelDrive II can be fitted to a 3.5" FeatherTouch focuser with the help of the Adapter Set #2957270
    https://www.baader-planetarium.com/en/steeldrive-ii-motor-adapter-set-for-ft-3.5%22-oaz.html
    Answer by: Baader Web Team (Admin) on Oct 27, 2022 8:37:00 AM
  390. Rated: 9
    3/21/2021 7:37 PM H-alpha 0.7x Telecompressor 2" for Solar Spectrum
    What are the threads on either side? Might it work with a Daystar quantum HA filter?

    Answer rated: -2
    Both sides have 2" threads - concerning Daystar filter compatibility - we really don't know.
    Answer by: Baader Web Team (Admin) on Mar 22, 2021 9:48:00 AM
  391. Rated: 9
    1/25/2019 12:04 PM Steeldrive II motor focuser with Controller
    Can the Steeldrive II be mounted to a 2 inch monorail focuser as fitted to a TS Optics Ritchey-Chretien.

    Answer rated: -8
    Unfortunately this will not work, you would have to replace the TS focuser with a Diamond Steeltrack Focusser
    Answer by: Baader Web Team (Admin) on Jan 25, 2019 12:37:00 PM
  392. Rated: 9
    11/1/2021 9:06 PM Baader SunDancer II H-alpha Filter
    I have a 100mm F/8 refractor, so I would get a D-ERF with the Sundancer. If a D-ERF is used, can the blocking filter of the Sundancer be left out? If so, can the Sundancer's blocking filter be separated from the Sundancer's telecentric, or can they only be removed together (blocking filter and telecentric appear to be a single assembly)? If the D-ERF and the SUndancer blocking filter are used together, what would be the effect on the image?

    Answer rated: 2
    The blocking filter should stay in place even if you place a DERF in front of your telescope. There are no negative effects.
    Answer by: Baader Web Team (Admin) on Nov 2, 2021 12:47:00 PM
  393. Rated: 9
    3/25/2017 8:38 PM Baader 2" / 90° Astro Amici-Prism with BBHS ® coating
    What advantage does the amici have over the roof prism? Which is better for astronomy? which is better for terrestial?

    Answer rated: 11
    In Europe the roof-prism was invented by an Italian calles "Amici" - thats why its called Amici-Prism here. The difference lies in the quality: the extreme accuracy of the roof edge and roof surfaces. Most roof prisms are only made precise enough for low mag terrestrial viewing. Otherwise the production cost would get too high.

    The amici/roof prisms that we supply with the BBHS-coating all are made according to the original optical specifications by Carl Zeiss. This is the reason for the high optical quality - good enough for high magnification work ( - and for the price as well).
    Answer by: Baader Web Team (Admin) on Mar 27, 2017 9:07:00 AM
  394. Rated: 9
    6/29/2020 3:42 PM Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
    What's the easiest way to attach the "Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp" to Televue NP127is and keeping the optical path shortest for Denkmeier Binotron 27 system?

    Is there also a way how to add UFC to the path and keep somehow ClickLock detachable for the bino vs single eyepiece use?

    Answer rated: 0
    You can replace the 2" Clicklock with Baader Adapter 2" (male) / T-2 (male) # 1508035, then you have a male T-2-thread at the end of the star diagonal. Here, you can either directly attach a binoviewer with female T-2-thread, or use a T-2 quickchanger (# 2456313A or # 2456313), if it has the Zeiss micro-bayonet dovetail. If your bino-viewer should have a female 2"/SC-thread, you can use Baader 2"/2" Inverter Ring with 48mm filter thread # 1508020 instead - I can't find an info about which threads the Denkmeier offers.

    To connect the UFC to one of our 2" star diagonals, you can e.g. remove the 2" nosepiece. It has got a male SC-thread, the body a female SC-thread. Then you need
    1x Baader UFC S70 / 2" SC-thread (f) Telescope-Adapter (optical height: 1 mm) # 2459128
    1x Baader UFC Base (Filter Chamber) telescope-sided S70 dovetail receptor (optical height: 13 mm) # 2459110
    1x Baader UFC 2" (m) SC Camera-Adapter (optical height: 2 mm) # 2459120
    plus the filter sliders. This adds 16mm to the length.

    Depending on the threads at the focuser of your telescope, it may be possible to connect the star diagonal via the SC-thread – but then, you can't rotate it easily into a convenient position, so this would be only recommended for telescopes on an alt-az mount.
    Answer by: Baader Web Team (Admin) on Jun 30, 2020 2:02:00 PM
  395. Rated: 9
    1/3/2021 3:33 PM BDSF: OD 3.8 Baader Digital Solar Filter (80mm - 280mm)
    When will the OD 3.8 filters in diameter 240/280 be back in stock? I haven't seen them in stock for a long time. Thanks a lot!

    Answer rated: -8
    Currently some products are out of stock due to delays in manufacturing and supply chains. Unfortunately, we cannot predict delivery times and cannot inform individually when a product is available. Therefore we have developed two automatic tools which we would like to ask you to use.
    1st Newsletter:
    If you enter your email address here, you will receive a monthly newsletter with a lot of information about our products and new releases
    https://www.baader-planetarium.com/en/newsletter/
    2nd "Notification Tool"
    On the page of items that are currently not available, there is a field "Notify me when the product is available".
    If you enter your email address there you will be informed as soon as the product is in stock.
    Thank youusing these tools and for your understanding!
    Answer by: Baader Web Team (Admin) on Jan 8, 2021 10:25:00 AM
  396. Rated: 9
    2/23/2023 6:30 PM Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
    I just replaced my Baader 2"/90° Astro Amici-Prism with BBHS ® coating (# 2456120) with the Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp (# 2456115) on which I put a Baader UFC.

    However, something bothers me using the UFC on the 2456115.

    While on the 2456120 the Filter slider can be inserted and removed from the right, on the 2456115, it must be from the left (forced position when the UFC is screwed onto the diagonal) .

    Can you tell me if it is possible to insert and remove the Filter slider from the right on the 2456115, in the same way as on the 2456120?

    Thank you.

    Answer rated: 0
    Unfortunately the way the mirror is built, there is no way to set the endpoint of a thread at a specific point. Another Mirror Diagonal might have the thread end at the perfect position for your UFC. This is not a suitable solution though, that's why we developed the S58 UFC Adapter specifically for this purpose. This is fastened via the dovetail on the mirror housing and thus fastened at any desired position. Please check out the application images on the product page.
    https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/universal-filter-changer/baader-ufc-s58-camera-adapter.html
    Answer by: Baader Web Team (Admin) on Feb 24, 2023 7:42:00 AM
  397. Rated: 9
    7/10/2020 8:09 PM Baader zero-tolerance protective Canon DSLR T-Ring T-2/M48 and 2"
    Looking at the Protective T-Ring with filter chamber, it does not look like there is much room to grip and thread in a 2" threaded filter. Is there some tool available to insert and remove the filters like the pin type face wrench? If not how does someone insert and remove a 2" filter without touching the lens in such a small space?

    Also, now that there are five different Canon EOS R camera models released, do you have any plans to make a version of this Protective T-ring with filter chamber that can directly connect to the Canon R Bayonet?

    Answer rated: 11
    There is no special tool. Most filters don't have a completely smooth filter cell, but provide some kind of grip, which is enough so screw them into the filter thread and to remove them again - you don't have to screw them in with force, just hand-tight. Usually, this thread is used to permanently mount 2"-filters in the T-ring. If you want to change the filter on a regular bases, you better use the 2" filter thread in the nosepiece.

    At the moment, we are not working on a Protective T-ring for other cameras, but all our nosepieces (for Wide T-rings as well as for standard T-rings or SC-thread) do have a 2" filter thread, so you can mount a 2" filter permanently in the nosepiece and protect it with the included dust-caps of the nosepiece, when it is not in use, without removing the filter.
    Answer by: Baader Web Team (Admin) on Jul 13, 2020 2:51:00 PM
  398. Rated: 9
    11/18/2021 6:31 PM Baader T-2 Stardiagonal (Zeiss) Prism with BBHS ® coating (T-2 part #01B)
    Is it possible to unscrew/remove the male T-2 thread on the prism diagonal, thereby exposing a female thread? I would dearly love a T-2 prism diagonal with female threads on both ends...

    Answer rated: 4
    Yes, the T-2 male adapter can be unscrewed to reveal another female T-2 thread. For removal of the adapter we recommend our adjustable pin type face wrench: https://www.baader-planetarium.com/en/adjustable-pin-type-face-wrench-%C3%B8-2mm.html
    Answer by: Baader Web Team (Admin) on Nov 19, 2021 8:24:00 AM
  399. Rated: 9
    4/12/2021 9:06 PM Fluorite Flatfield Converter (FFC) / 3x-8x
    In follow-up to my first question, please tell me the mechanical length of this device, really its optical length in mm from mating surface to mating surface excluding the protruding threads. The charts you mentioned do not provide this information, and I need to determine if there is sufficient backfocus distance on my optic to install it.

    Answer rated: -1
    The mechanical length of the 2" plug-in sleeve is 55mm (measured from the ribbed stop ring down)
    Answer by: Baader Web Team (Admin) on Apr 13, 2021 12:43:00 PM
  400. Rated: 9
    11/12/2016 11:14 PM Baader zero-tolerance protective Canon DSLR T-Ring T-2/M48 and 2"
    Does this T ring assembly fit the Baader 2 inch semi-apo filter?

    Answer rated: -3
    The 2" nosepiece has got a 2" filterthread, so you can use any filter mounted in a 2" filter cell.

    But you can not use the filter compartment of the Protective T-Ring for this filter, as this requires filters with 50.4mm diameter. Anyway, you can use it to use the 2" SemiApo and another 50.4mm filter at the same time.
    Answer by: Baader Web Team (Admin) on Nov 14, 2016 10:16:00 AM
  401. Rated: 9
    1/19/2021 8:47 PM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    What specific camera adapter and spacers do I need to achieve the proper 55mm of back focus for photographic purposes between the MPCC Mark III and my Nikon Z7 mirrorless?

    Answer rated: 13
    The Nikon Z-cameras have got a back focus of 16mm.
    The Wide T-ring need 8,3mm, no matter if you use it with T-2 or with the additional S52 / M48 adapter #2958552

    The MPCC requires 55+/-1mm distance, when used with T-2 or the optional Baader M48 Spacer Ring for MPCC III / Protective EOS T-Ring
    # 2458405, or 57,5+/-1mm when used with the M48-thread, but without the adapter #2458405

    If you use either T-2 or M48 with the adapter #2458405, you need an additional 30.7mm-extension (+/-1mm) in T-2 or M48.
    For T-2-this can be done e.g. with
    2x Baader T-2 / 15 mm Extension Tube (T-2 part #25A) # 1508154
    1x Set: T-2 Fine-Adjustment rings (0,3 / 0,5 / 1 mm) - Aluminium # 2457910
    or
    1x Baader VariLock 46, lockable T-2 ExtensionTube 29-46mm with spanner tool (T-2 part #25V) # 2956946

    For M48, we do not have the spacer rings yet, but you could use
    2x M48 Fine-Adjustment ring 1mm (gold) - Aluminium #2457918
    1x Baader Hyperion Finetuning-Ring, 28 mm # 2958228

    If you use the MPCC without the optional adapter #2458405, you need a 33.2+/-1mm-extension - for this, we do not have a solution at the moment.

    For a fullframe camera, we'd recommend the M48-adaptation because of its larger clear aperture.
    Answer by: Baader Web Team (Admin) on Jan 20, 2021 10:09:00 AM
  402. Rated: 9
    12/6/2022 12:20 PM Baader FlipMirror II Star Diagonal
    Which adapters i need to interface Flip Mirror 2 with a Celestron C11 XLT?
    thank you

    Answer rated: 19
    We recommend to upgrade the C11 with a 2" eyepiece clamp like #2956233 SCL (3,3")-ClickLock (9¼" HD, 11" SC/HD and 14" SC/HD), then you can use 2" / S52 Nosepiece # 2958551 and attach the Flip Mirror like a 2" eyepiece.

    If you prefer a screw-connection, you can use Baader SC / HD Ultra Short T-Adaptor, 9mm optical length # 2958500B with the 2" SC thread of your telescope and the T-2-thread of the flip mirror, and maybe a T-2-quick changer if you want to rotate the mirror easily into a conveniant position.
    Answer by: Baader Web Team (Admin) on Dec 6, 2022 1:41:00 PM
  403. Rated: 9
    6/20/2023 3:43 PM Research Grade H-alpha 0.4x Telecompressor 2" for Solar Spectrum
    I have the 0.4x reducer, and both a TZ4 (for my 80mm refractor) and TZ3 (for my 8" Tri-Band SCT). I also have a Solar Spectrum H-alpha filter (25mm clear aperture, 55mm optical length). If I attach the 0.4x reducer directly to the filter, and ensure 74mm distance to sensor, how much distance should I have between filter and telecentric in either case?

    Answer rated: 8
    In this case, with a reducer behind the filter, the distance between filter and telecentric is not defined because behind the telecentric all light beams are parallel to infinity. You only need to take care to have the camera in the right distance to the reducer. Here are more informations about the telecentric https://www.baader-planetarium.com/en/downloads/dl/file/id/129/product/1541/baader_telecentric_systems_tzs_for_h_solar_filters.pdf
    Answer by: Baader Web Team (Admin) on Jun 20, 2023 3:51:00 PM
  404. Rated: 9
    3/9/2019 1:02 AM Baader Wide-T-Ring Fujifilm X with D52i to T-2 and S52
    What parts do i need to connect fuji-x mount to celestron rasa 8"

    Answer rated: 22
    The camera has a back focus length of 17,7mm and the mentioned T2-ring is 8,3mm which gives in summary 26mm. From T2 adapter of the
    RASA 8 it is 25mm and by that unluckily 1mm too short. There are adapters from Celestron available for this telescope for Sony and Canon
    mirrorless, hopefully there will be more per haps for Fuji-X and others also.
    Answer by: Baader Web Team (Admin) on Mar 11, 2019 9:52:00 AM
  405. Rated: 9
    1/26/2021 2:01 PM RT-Adapter M93 x 1 Diamond Steeltrack®
    What is the length of the M93 male-threaded portion on this adapter?

    Answer rated: -7
    The length of the M93 thread is 6,5mm and the total length is 20,5mm. The dimensions of the BDS-RT are here:
    https://www.baader-planetarium.com/en/downloads/dl/file/id/28/product/2858/bds_rt_dimensions_technical_drawing.pdf
    Answer by: Baader Web Team (Admin) on Jan 27, 2021 7:57:00 AM
  406. Rated: 9
    8/16/2019 2:55 PM Baader DSLR-2" Filter Holder M48/SP54
    I would like to use a 2" UV Filter on a lens with 46 mm thread. Could you please tell me which additional rings I need for this.

    Answer rated: 0
    In addition to the 2"-filter and your camera, you need:
    Baader Hyperion DT-Ring SP54/M46 for DTAdapter II&III and Hyperion Eyepieces # 2958046
    Baader DSLR-2" Filter Holder M48/SP54 # 2408166
    Answer by: Baader Web Team (Admin) on Aug 19, 2019 10:48:00 AM
  407. Rated: 9
    4/27/2021 1:59 PM Baader Heavy Duty M48 Quick Changing System
    what is the maximum payload in KG (eg. ccd camera + filterwheel) that can be supported by this adapter? thanks

    Answer rated: 18
    I don't know the answer to my own question... but I can tell that I bought it and it's working very well with my QHY268M + QHY filter wheel (5). It's a wonderful little accessory that speeds up the mount/unmount operations. Baader Team: you should also provide 2 plastic caps with it!
    Answer by: Valerio on May 31, 2021 7:48:42 PM
  408. Rated: 9
    8/17/2021 8:19 AM Baader D-ERF Energy Rejection Filter (75 - 180mm)
    Is possible use the d-erf with my telescope celestron 127slt?

    Answer rated: 3
    An DERF cannot be used "stand alone" for observing the sun! This would be dangerous because the image is way too bright and will immediately damage your eye permanently! DERF filters are only suitable in combination with an SolarSpectrum filter https://www.baader-planetarium.com/en/solar-observation/solar-spectrum-h-alpha-filters.html
    Answer by: Baader Web Team (Admin) on Aug 17, 2021 9:19:00 AM
  409. Rated: 9
    8/19/2019 4:12 PM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    I want to use the full aperture of my D810A with the MPCCIII on a Meade f/4 Schmidt-Newtonian. What adapters to I need to achieve the ideal backfocal distance?

    Answer rated: 2
    The flange distance is 55mm for T-2 (so any standard T-2-ring will do) or 58mm for the M48-thread.
    For a full-frame-camera, we recommend using the M48-thread of the MPCC, the Baader M48 Spacer Ring for MPCC III / Protective EOS T-Ring #2458405 and Baader zero-tolerance protective Canon DSLR T-Ring T-2/M48 and 2" #2958550.

    Answer by: Baader Web Team (Admin) on Aug 21, 2019 8:32:00 AM
  410. Rated: 9
    10/20/2018 12:43 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    When will the M68i x 0,75-ClickLock adapter be available?
    Thanks in advance, Bart.

    Answer rated: 54
    We expect the M68i x 0,75 ClickLock to be in stock by the end of the year.
    Answer by: Baader Web Team (Admin) on Oct 22, 2018 3:38:00 PM
  411. Rated: 9
    12/17/2019 2:16 PM BCF 1 - DSLR Astro Conversion Filter for Canon APS-C Cameras (all latest Models)
    I am going to modify Nikon D5600 for astrophotography and want to replace the stock filter with IR/UV cut filter from Badder. I want to increase the Hydrogen-alpha sensitivity. In your website I only see unmounted filters for Canon bodies. Is there any filter I can use for Nikon APS-C body ? I am fine to cut it to proper size in case your filter size is bigger. May I please request your suggestion on which one to purchase ?


    Thanks & Regards
    Diganta De

    Answer rated: 5
    None of our filters for modifying Canon cameras works for Nikon or Sony cameras. And we do not have other choices of filters to replace the original filter in the cameras of these brands. We are very sorry.
    Answer by: Baader Web Team (Admin) on Dec 17, 2019 2:33:00 PM
  412. Rated: 9
    2/3/2021 12:56 PM The Original: Baader Planetarium
    Firmly interested in the Planetarium; please keep me in a waiting list.
    Please let me know expectations on a shipping date.

    Answer rated: -7
    The Baader Planetarium gets handcrafted here in our factory in very small qty. Therefore the delivery time is several month, we cannot say more exactly. Please send us your complete adress then we can add you to the reservation list.
    Answer by: Baader Web Team (Admin) on Feb 4, 2021 11:04:00 AM
  413. Rated: 9
    5/12/2021 11:16 AM Baader U-Venus-Filter (350nm)
    Do you think that Celestron Neximage 5 with 2X APO Barlow and this 1 1/4" filter in an OTA, Celestron C8" XLT will be sensible enough to capture Venus cloud structures?

    Answer rated: -13
    We have not tried this combination but the U filter is very dark wich lead to very long exposure times even with ideal cameras. Furthermore the camera you mention has a colour sensor with bad UV sensitivity. Therefore we doubt that you will create nice images of the Venus clouds with this combination.
    Answer by: Baader Web Team (Admin) on May 14, 2021 12:16:00 PM
  414. Rated: 9
    3/31/2019 8:06 AM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    In one of the questions above, you recommend placing the 0.63x reducer/corrector after the Steeltrack focuser. Which adapter would I need to thread the reducer/corrector directly to the Steeltrack focuser?

    Answer rated: 16
    You do refer to to the SC-reducer with SC-thread on the telescope side?

    Unforunately, we do not have a mounting plate with SC-thread, but you have two options:
    1) Baader 2" Safety Kerf nosepiece with 2" filter thread # 2408156 equips the corrector with a 2"-nosepiece, so that you can use it like a 2" eyepiece.

    2) 2"a / M48i Zero-length reducing piece (zero optical length) # 2454834
    plus
    Diamond Steeltrack® M48 Adapter # 2957204
    This option would be more sturdy and shorter, but the free aperture is a little bit smaller, so I wouldn't recommend it for very large sensor sizes.
    Answer by: Baader Web Team (Admin) on Apr 1, 2019 9:01:00 AM
  415. Rated: 9
    9/6/2022 7:39 PM Hyperion Zoom 2.25x Barlow lens
    What is the focal length of the Hyperion zoom barlow?

    Answer rated: -3
    The Hyperion Barlow was designed to give a magnification of 2,5x when used with the Hyperion Zoom eyepiece.

    If you want this magnification with a camera, the camera sensor should be not more 25mm (or even a little bit closer) away from the Barlow lens (that is, measured from the start of the thread - if your camera has got 10mm of backfocus, you need a 15mm T-2-extension).
    Answer by: Baader Web Team (Admin) on Sep 16, 2022 2:05:00 PM
  416. Rated: 9
    7/14/2023 7:27 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I have a TS 80mm extension tube for my 100mm/f8 refractor and I’d like to replace it with ClickLock.
    Is it possible to add further extension ring(s) to the #2956247 Baader 2" ClickLock 47 mm, to extend it to 80mm?

    Answer rated: -4
    You can further expand the 2" ClickLock with the 47mm extension with another 2" Safety Kerf Nosepiece Thread Adapter (# 2408156).

    Alternatively, you can use our M48 extension tubes to select your desired back focus (e.g. using the 15mm, 10mm and 7.5mm extension tube): https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/extensions-/-focusing-adapters/m48-extension-tubes-(5--7.5--10--15--30--40-mm).html
    Answer by: Baader Web Team (Admin) on Jul 17, 2023 12:09:00 PM
  417. Rated: 9
    1/4/2023 1:00 AM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    I have a Celestron 9.25" Edge HD SC, A Baader BDS-SC focuser, a Celestron offset guider, and a Zau camera. When I put this all together the distance to the camera sensor is 6 3/4" which is beyond your recommended optimum back focus distance of 5 3/4". I found that if I remove the large nut at the back of the rear cell of the scope and set the focuser over the threads my back focus distance is almost perfect. My problem is I need an adapter that will fit the threads, with the nut removed, at the rear cell and also thread into the focuser. Is there such an adapter? My only other choice is to remove the focuser from the assembly. Any advice would be greatly appreciated.

    Answer rated: 5
    We are sorry but we do not have such an adapter.
    Maybe you can find somebody in your country who offers custom-made adapters?
    Answer by: Baader Web Team (Admin) on Jan 4, 2023 12:10:00 PM
  418. Rated: 9
    4/26/2020 12:23 AM Baader 2" Cool-Ceramic Safety Herschel Prism (Visual / Photographic)
    Could you please let me know how to use this prism in conjuntion with 1.25" double stack cotinuum + polarizing filter + Maxbright II binos?. Thanks in advance.

    Answer rated: -15
    The basic adaption of our bino-viewers is by replacing the 2" ClickLock of the Herschel with
    Baader Adapter 2" (male) / T-2 (male) # 1508035
    Then you have a T-2-thread, onto which you can mount the binoviewer or the T-2 QuickChanger as described in the manual (page 18 in the manual of the MaxBright II); the 2"-filters of the Herschel wedge fit into the 2"/T-2 adapter. We recommend a T-2 quickhanger, so that you can insert the glasspath correctors for T-2 into the binoviewer; be careful with the 2.6x gpc as it may hit the filters in the Herschel.

    By using the T-2-connection, you can also use
    Baader T-2 Conversion Ring # 2958110 plus
    Baader Double T-Filterholder 1¼" # 1508030
    to mount a 1.25" filter in front of the binoviewer. Again, this may be problematic with the 2.5x gpc as it faces towards the telescope and not into the binoviewer, so make sure that you have enough backfocus.

    Installing a single polarizing filter is tricky, as you can't rotate the binoviewer as easily as an eyepiece. There should be enough place to mount the filter in front of the double stack and use the T-2 quickchanger to access it for adjusting the brightness.
    Answer by: Baader Web Team (Admin) on Apr 28, 2020 12:18:00 PM
  419. Rated: 9
    1/17/2017 3:40 AM Baader Universal Red Dot Mount (RDM) incl. Standard Finder Base
    I have a Celestron C8. There are two sets of spacing for the mounting holes, one set appears to be about 1.25 inches, the other about 1.75 (as measured between holes). Will this mount fit the smaller spacing?

    Answer rated: 11
    The holes which are 1.25 inches apart are specifically designed for that purpose, so the Baader Standard Base will fit there perfectly. The other holes are meant for an additional dove tail to mount accessories on top of the OTA. In each case, you should use only the original screws or short screws because long screws might damage the primary mirror.
    Answer by: Baader Web Team (Admin) on Jan 18, 2017 2:46:00 PM
  420. Rated: 9
    2/19/2021 9:23 PM Baader 36mm Hyperion Aspheric 2" Eyepiece
    In order to use this eyepiece for eyepiece projection with the Nikon Z6, what parts do I need beside the Nikon Z wide T-ring? Will there be any vignetting?

    Answer rated: -6
    According your question you´ll find under Downloads our PDF document about digiscoping which shows you all the possibilities to adapt:
    https://www.baader-planetarium.com/en/downloads/dl/file/id/444/product/1217/digiscoping_camera_adaptations_for_afocal_photography_and_eyepiece_projection.pdf
    If the distance eye piece <-> camera is too short you´ll see dark corners in the image. This is not a vignetting but the exit pupil of the eye piece is
    just too close to the camera sensor.
    Answer by: Baader Web Team (Admin) on Feb 22, 2021 10:58:00 AM
  421. Rated: 9
    11/3/2023 1:58 PM Baader Multi-Purpose Vario Finder 10x60 (single or with MQR-IV finder holder)
    What is the filter screw thread size to screw into the Vario finder front pull out lens shade?
    I notice that it has screw threads. Thank You.

    Answer rated: 2
    The mentioned thread size is M71 x 0.75
    Answer by: Baader Web Team (Admin) on Nov 6, 2023 7:19:00 AM
  422. Rated: 9
    5/15/2022 7:05 PM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    i have this focuser: 2" BDS-SC Baader Diamond Steeltrack® Focuser for my MEADE ACF SC but i want use also for my GSO RC10 TRUSS telescope. Do you have a ting adapter for m117(3,5") to m82 (3,3") ? Thanks

    Answer rated: 29
    Unfortunately, we haven't made a M117-adapter yet.
    Answer by: Baader Web Team (Admin) on May 16, 2022 8:30:00 AM
  423. Rated: 9
    5/16/2022 4:38 PM Baader Sky-Surfer III red dot finder
    Does it require batteries and if so what kind and where do they go?

    Answer rated: -10
    Battery is necessary and included. Its mounted on the bottom of the front side of the finderscope. Its a little Lithium cell.
    Answer by: Baader Web Team (Admin) on May 17, 2022 9:39:00 AM
  424. Rated: 9
    9/25/2022 11:27 PM Baader Multi-Purpose Vario Finder 10x60 (single or with MQR-IV finder holder)
    What size 'O' ring is used for the battery compartment for the illuminator switch.
    Thanks,

    Answer rated: 14
    The O ring has 24mm, plastic cover thread from battery has 28mm
    Answer by: Baader Web Team (Admin) on Oct 14, 2022 7:18:00 AM
  425. Rated: 9
    2/23/2021 6:57 PM Baader T-2 Quick Changer with Zeiss Micro Bayonet (T-2 part #06)
    can you tell me the outer diameter of a zeiss micro bayonet male fitting? i have a japanese zeiss copy from the 1950s and i want to see if this adapter will work with it (e.g, i need to know whether the japanese microscope bayonet is a zeiss fit).

    Answer rated: -3
    Unfortunately, this will not work. The Carl Zeiss Jena Astro-ring-dovetail has got a different dimension than any of the micro-dovetails of either Zeiss- East or Zeiss-West microscopes.
    Answer by: Baader Web Team (Admin) on Feb 24, 2021 4:25:00 PM
  426. Rated: 9
    1/26/2017 8:26 PM Baader ClickLock Eyepiece Clamp 1¼" with built in diopter-adjustment (T-2 part #08)
    I would like to have a better visual back for my Celestron 8" EdgeHD, something that grips the eyepieces much better. First - does this Baader 2458100 fit directly (no adapters?) on to this OTA when the Celestron visual back is removed? Second - can you recommend any other locking backs for 1.25" eyepieces thst would fit this tube?

    Answer rated: 31
    EdgeHD and SC-telescopes have got an SC-thread; this adapter has got a smaller T-2-thread (M42x0,75), so it will not fit. You could use a SC/T-2-adapter to attach this Clicklock to your telescope, but it would not be very flexible.
    The best and much more versatile solution would be the 2"-SC-Clicklock #2956220 (for telescopes up to 9,25") and a 2"/1,25"-reducer like Baader 2" to 1¼" ClickLock Reducer (T-2 part #15B) # 2956214 - then you can also use 2"-eyepieces and have a much larger field of view.
    Answer by: Baader Web Team (Admin) on Jan 30, 2017 11:58:00 AM
  427. Rated: 9
    7/20/2017 4:55 PM Mark V Großfeld (Giant)-Binocular
    Good evening, I just bought a Mark V. The two rings left side solidarity, it is not possible to adjust the diopter on this side? Is this normal?
    In addition, on the right side, there is a small opening about 15 ° at the bottom of the right eyepiece tube. A little external light penetrates into the right tube. Is that also normal?

    Answer rated: -23
    The locking rings move in opposite directions (one clockwise, one couterclockwise) - but both have a diopter adjustment and a clicklock, so you should be able to rotate both rings.

    Iy fou are talking about the whole close to the bridge, which is closed when you move both parts of the binoviewer to the closest pupil distance: This is normal and necessary to adjust the interpupillar distance; but intruding light is no problem.
    Answer by: Baader Web Team (Admin) on Jul 24, 2017 11:03:00 AM
  428. Rated: 9
    1/19/2022 9:27 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Which click-lock would be appropriate for an Orion 8" newtonian astrograph?
  429. Rated: 9
    4/28/2023 2:42 AM Baader D-ERF Energy Rejection Filter (75 - 180mm)
    When mounting your 110 mm D-ERF ahead of a front etalon, how much tilt should the cell impose to avoid reflections?

    Answer rated: 5
    We don´t tilt the DERF at all. Because these are dielectric coated filters, tilting leads to a shift in wavelength.
    Answer by: Baader Web Team (Admin) on Apr 28, 2023 9:36:00 AM
  430. Rated: 9
    10/5/2021 10:52 PM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    How long is the nose of the MPCC up to the stop ring? Why don't you publish these details?

    Answer rated: -10
    The length you´re asking for is 23,5mm. Yet nobody where asking for this length and actually every 2" focuser should take the MPCC without any
    problems.
    Answer by: Baader Web Team (Admin) on Oct 7, 2021 8:27:00 AM
  431. Rated: 9
    7/27/2018 5:58 PM Baader Multipurpose Finder Bracket MQR IV 9x60 finder (max diameter 72mm)
    Hi there.. Any idea is the shoe of this item will work with the focuser of the SW Esprit 100ED? The focuser is 3in
    Thanks,
    Diego

    Answer rated: 1
    The MQR fits into the standard finder shoe of the Sky-Watcher telescopes. Although we do not sell the Esprit or have it here, judging from the images on the web it uses the same finder base, so it should be no problem.
    Answer by: Baader Web Team (Admin) on Jul 30, 2018 11:24:00 AM
  432. Rated: 8
    3/12/2021 10:13 AM Baader UFC (Universal Filter Changer)
    I want to use the UFC with the 2” star diagonal with a Celestron 9.25 SC. The diagonal manual states that I need part #2459117 (M54) between the ufc and the diagonal. Is this correct? Don’t I need the #2459120 part (2” connection)?

    Answer rated: -17
    You are correct that in this case the item number #2459117 was a mistake and should be replaced by #2459120.
    However, meanwhile there is an even better solution available which wasn't at the time the diagonal manual was written. We will update this soon.
    We now sell the UFC S58 dovetail adapter #2459125 which allows you to rotate and fasten the Baader 2" diagonal or prism in any position. Check out the product page and especially the application images: https://www.baader-planetarium.com/en/filters/universal-filter-changer/baader-ufc-s58-camera-adapter.html
    Answer by: Baader Web Team (Admin) on Mar 12, 2021 10:36:00 AM
  433. Rated: 8
    9/1/2016 12:13 PM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    I want to mount my BDS-SC on c11 celestron. So I wanted to move the “reducer-adapter SC/HD 3.3 UNF to SC/HD 2 UNF”. How proceed, unscrew it? with what kind of tool? (I don’t want to damage it)
    Regards
    Alain

    Answer rated: 0
    i have succeeded to remove the adapter. thank you
    Answer by: alain thiry on Sep 1, 2016 12:47:00 PM
  434. Rated: 8
    3/13/2021 12:38 AM Baader 2" ClickLock Diagonal Mirror
    I have ordered Baader's hyperion mark 4 w/ 2.25x barlow, AND the Baader's 2" click lock diagonal. With the 2" thread on the zoom, and barlow installed, is this setup compatible with the 2" click lock diagonal? Thank you!

    Answer rated: -1
    It works only in the way you see here (even if the photo is a Mark III Zoom) https://assets.baader-planetarium.com/media/extendware/ewimageopt/media/inline/3d/4/hyperion-zoom-barlowlinse-225-fach-b0d.jpg
    You need to remove the 1,25" barrel from the Hyperion Zoom and screw the barlow directly on
    Answer by: Baader Web Team (Admin) on Mar 19, 2021 12:28:00 PM
  435. Rated: 8
    2/9/2022 2:05 AM Fluorite Flatfield Converter (FFC) / 3x-8x
    Can I use this as an adjustable strength barlow on a refractor that already has be corrected for flat field or a Newtonian that is already coma corrected, or do I need to remove all existing correctors from the optical train ?

    Answer rated: 4
    If you use the FFC on a flat field corrected refractor, there will be a slight overcorrection that shows at the edges of the field of view. However, the centre of the image is flawless for planetary photography, for example.

    In principle, you can also use the FFC on an uncorrected Newton, but the coma will not disappear. And using a coma corrector in combination with a projection optic is difficult because the constructive requirements for the image distances do not match. We therefore advise against trying to combine a coma corrector with the FFC.

    The effect on the Newtonian, as with a corrected refractor, depends on the size of the object to be photographed. If only the centre of the field is to be used, for example to capture a planet with the highest possible sharpness, then a coma corrector is unnecessary anyway and the FFC can still provide its full performance.

    Answer by: Baader Web Team (Admin) on Feb 9, 2022 8:45:00 AM
  436. Rated: 8
    9/11/2020 5:18 PM Alan Gee Telecompressor Mark II (T-2 part #20)
    I want to use the Telecompressor for visual and i want to know how it need to be use with :

    Celestron C11 (no edge)
    2956233 Baader 2" ClickLock SCL (3.3")
    2956100 Baader 2" ClickLock Diagonal Mirror
    2956214 Baader 2" to 1¼" ClickLock Reducer (T-2 part #15B) with 31.5 Eyepieces

    In the manual it seem need :

    2408150 Baader 2" nosepiece to T-2 / M48 (T-2 part #16)
    2958242 Baader Expansion Ring 2"a/T-2i with 1mm optical path length (T-2 part #28)

    But it's not clear. Can you explain ?

    Answer rated: 4
    Yes, that is the recommended installation:
    Remove the 2" nosepiece from the star diagonal, then you have access to an SC-thread
    Insert T-2 Part #: 28 Baader Expansion Ring 2"a/T-2i with 1mm optical path length (T-2 part #28) # 2958242
    Place the collar aof the Alan Gee on the T-2-thread
    Secure it with 2408150 Baader 2" nosepiece to T-2 / M48 (T-2 part #16)
    Then you can insert the star diagonal as usual into the eyepiece holder of the telescope.

    You can change the distance to the eyepiece and by this the reducing factor by adding/removing the included spacer tubes or additional T-2 extensions.
    Answer by: Baader Web Team (Admin) on Sep 14, 2020 1:56:00 PM
  437. Rated: 8
    2/9/2022 4:47 PM Universal Red Dot Mount RDM
    I have puchased a WO zs66sd and it came with the base from the 1st gen WO rdf I need to use the base as i tried your Baader std base because of the curved bottom but its to wide and contacts the screw holding the view finder in place.Could you tell me the width of the top pce im hoping its not more than 15mm then i can slot it in the base im forced to use, as the gun rail is 11mm im hoping this is the case.

    Answer rated: 2
    The upper Picatinny rail dovetail, to which the red dot finder connects, is 12mm wide and narrows to ca. 9mm at its lower base.
    Answer by: Baader Web Team (Admin) on Feb 10, 2022 10:19:00 AM
  438. Rated: 8
    9/1/2023 12:12 AM Telecentric System TZ-2 (2x focal length)
    Do you plan to develop a new version of the TZ-2 system, like the new TZ-3S or the TZ-4S? And a sort of TZ-1.5S for a 1.5x telecentric lens? I think they would be very useful to get the best views of the complete Sun with some telescopes. Thanks.

    Answer rated: -3
    At the moment, we have no plans for a 2x telecentric system, as we developed them mostly for H-alpha-observations, where f/30 or larger is necessary - and a 2x TZ would require a telescope with f/15, buch such slow telescopes have come out of fashion and are no longer manufactured. There is no longer a market for a dedicated H-alpha-version like the old TZ2. We'll keep an eye on the market if there is demand for a 2x achromatic telecentric.

    So far, we can offer you only e.g. the Baader Q-Barlow 1.3x/ 2.25x # 2956185, which you can use at 1.3x to 2.25x, depending on the distance to the sensor/eyepiece. For a barlow, the magnification changes with the distance, we have some information about the calculations in this PDF for the VIP barlow: https://www.baader-planetarium.com/en/downloads/dl/file/id/240/product/1062/calculating_different_magnifications_with_the_vip_barlow.pdf

    Maybe this is an alternative for you?
    Answer by: Baader Web Team (Admin) on Sep 1, 2023 9:44:00 AM
  439. Rated: 8
    7/9/2022 4:50 PM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    Hello, I want to install this focuser to my Maksutov 180 f/15 from Sky-Watcher (Skymax 180 Pro). My scope has a Schmidt-Cassegrain exit. Will it be feasible ?

    Answer rated: -1
    Yes the Diamond Steeltrack SC will fit onto this OTA because it has a 2" SC thread.
    Answer by: Baader Web Team (Admin) on Jul 11, 2022 9:25:00 AM
  440. Rated: 8
    3/23/2021 6:27 PM Baader MaxBright® II Binoviewer with case
    Interestingly, everywhere I read that binoviewers don't require any focal point adjustments for Maksutov telescopes, yet I read you recommend one. My Mak is f/15, so buying Maxbright 2 will cost extra accessory?

    Answer rated: -10
    As a rule of thumb, you do not need a glasspath corrector for telescopes with focal ratios of f/10 or slower. On a Mak or Schmidt-Cassegrain, it is usually also not necessary to reach focus. So, you are probably fine without a glasspath corrector. However, some observers notice an improvement when using a gpc - although we are not sure if this is just because of the additional magnification or because of increased image quality. But that's the reason why we recommend a gpc even for Schmidt-Cassegrains and similar telescopes - but it is only a recommendation, it is not a necessity.
    Answer by: Baader Web Team (Admin) on Mar 24, 2021 12:14:00 PM
  441. Rated: 8
    6/30/2020 7:10 AM Baader 17mm Hyperion 68° Modular Eyepiece
    I want to use it as a 2" eyepiece, what will be the focal length?

    Answer rated: 9
    As 17mm eyepiece, you can use it both with 1.25" and 2" focusers.
    If you remove the 1.25" nosepiece with the included optics, you have a 21.8mm eyepiece, which fits only for 2" focusers.
    Answer by: Baader Web Team (Admin) on Jun 30, 2020 12:44:00 PM
  442. Rated: 8
    7/18/2022 8:46 PM QHY 268 M/C BSI Cooled Medium Size APS-C Cameras (various versions available)
    I am planning to buy a QHY268M Photo camera. According to your info, the telescope connection is M54(0.75). Could you let me know if it is either a male or a female connection.
    Could you also confirm that the desiccant plug is included in the camera box.
    Many thanks for your attention.
    Best regards,
    Jose

    Answer rated: -2
    The QHY268M-PH has a female M54x0.75 thread.

    A technical drawing of that version can be viewed under:
    https://www.qhyccd.com/wp-content/uploads/20210427564-2048x1448.jpg

    Both the desiccant tube and the desiccant plug are in the scope of the delivery.
    Answer by: Baader Web Team (Admin) on Jul 19, 2022 8:49:00 AM
  443. Rated: 8
    7/19/2021 8:44 PM Baader K-Line Filter 1¼" (double stacked)
    Can this filter be used with the Baader Herschel Wedge - instead of the solar continuum filter - screwed onto a camera nosepiece?

    Answer rated: -11
    Please note that the K-Line-filter is only intended for photography, not for visual use, as the K-line is well in the UV.

    You can't combine K-Line and Solar continuum, as one filter only lets green light pass, and the other one only deepest blue.

    You can replace the Solar Continuum with the K-Line-filter, but the image will probably still be too dark - and it will almost certainly be much too bright if you remove the ND3-filter, too. This depends on the sensitivity of your camera and on the f/ratio of the telescope, so we can't say which filter will be the right one.

    The photographic version of the Herschel wedge contains three 2" ND-filters. If you do not have the photo-version of the Herschel, you can also buy them seperately at
    https://www.baader-planetarium.com/en/filters/polarizer-neutral-density/baader-neutral-density-filter-(nd-1.8-t1.5).html
    As the K-Line-filter is only 1.25", you can also buy only the 1,25"-filters for photography.

    You may need more than one filter, if you use e.g. a Barlow lens for higher magnifications - then you need a stronger filter like ND1.8 for lower magnifications and e.g. ND0.9 or even N.0.6 for those times when the seeing permits highest magnifications.
    Answer by: Baader Web Team (Admin) on Jul 20, 2021 3:07:00 PM
  444. Rated: 8
    3/4/2022 5:13 PM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    Hello.... I have a Celestron STarsense 130dx scope.... Can I use this 2” MPCC Mark III coma corrector with it..?
    I would like to use my Sony a6500 with both...I have already used it with ocular projection, but there is a lot of stars with coma imaging.... thanks in advance..

    Answer rated: -15
    We never tried this out and do not think it will work. Unfortunately the StarSense explorers are not designed for Deep Sky Astrophotography and the necessary long exposure times. They have no motors, the mount and the focuser are not able to carry the addional camera stable enough. We don´t think it makes sense to try to make this work.
    Answer by: Baader Web Team (Admin) on Mar 7, 2022 10:16:00 AM
  445. Rated: 8
    4/28/2017 10:59 PM Baader f/2 Highspeed-Filters (H-alpha, O-III, S-II)
    What is the band width (nm) of the F2 Highspeed narrow band filters?

    Answer rated: -40
    I'm sorry but we can't publish this value - to make them work at f/2, we had to use rather unusual values, which we can't publish so far. But if you take a look at the images made with these filters, you'll see that they work - that's better than every transmission graph.
    Answer by: Baader Web Team (Admin) on May 15, 2017 2:06:00 PM
  446. Rated: 8
    1/14/2021 6:10 PM Baader FlipMirror II Star Diagonal
    I’m trying to build my optic train for a Nikon Z6 and an eyepiece on a Celestron 8” SCT (non EdgeHD). As I understand it, the back focus for the telescope is 127mm (5”). If I connect the OTA via the baader short adapter, what adapters do I need on both the camera train and the eyepiece train?

    Answer rated: -5
    Lets start with the camera:
    - Nikon Z6 - 16mm
    - Baader Wide-T-Ring Nikon Z (for Nikon Z bajonet) with D52i to T-2 and S52 # 2408335 (8.3mm)
    - optional Reducing piece S52 / M48 # 2958552 (zero length) (for a wider clear aperture; not necessary, if you use T-2 on the telescope side)

    The field stop of the eyepiece should be in the same distance from the FlipMirror as the camera sensor. That's ca. 24mm, if you attach the Wide-T-ring directly to the FlipMirror. Then you can use
    - Baader Focusing Eyepiece Holder 1¼" / T-2 (T-2 part #08A) # 2458125, 29-35mm for the eyepiece
    and
    - Baader T-2 / 7.5 mm Extension Tube (T-2 part #25C) for the camera # 1508155
    This gives you a working distance of 31,5mm for the camera and 29-35mm for the eyepiece. With this setup, you should reach focus with most eyepieces - usually, the field stop is at the transition between eyepiece body and 1.25" nosepiece, but it can vary. (We all know, that eyepieces are not parfocal...)

    The length of the setup is then:
    31,5mm for camera (and eyepiece)
    59mm for Baader FlipMirror II Star Diagonal # 2458055 when used with T-2
    15mm for Baader T Adapter (BTA) for SC and MAK Telescopes (T-2 part #21) T-2 Part #: 21 # 2408160
    => 105,5 mm

    Optimum back focus is 127mm, so you need an additional 21.5mm extension, e.g.
    Baader VariLock 29, lockable T-2 ExtensionTube 20-29mm with spanner tool (T-2 part #25Y) # 2956929,
    if you want to be precise. (a 20mm extension should work good enough, and there is always Set: T-2 Fine-Adjustment rings (0,3 / 0,5 / 1 mm) - Aluminium #2457910) If you want to use the Off Axis Guider, you should place one 211mm-extension in front of the camera and one in front of the eyepiece holder, this will give you more back focus fur the guiding camera. If you don't use the off-axis-port, you can save money and put the extension between flip mirror and telescope. Fortunately, a Schmidt-Cassegrain is a userfriendly telescope, so that you don't have to keep to distance to a tenth of a millimeter.
    Answer by: Baader Web Team (Admin) on Jan 18, 2021 1:43:00 PM
  447. Rated: 8
    3/7/2023 1:06 AM Baader Prism Diagonal T-2/90° 32mm
    What is the purpose of item # 1508154? Is it necessary to connect the diagonal to the UltraShort SCT adapter?

    Answer rated: 2
    If you want to use our T-2/90° prism with a 2" ClickLock clamp and our Ultrashort SC-T Adapter (as shown in the below linked two images), you will indeed need the 15mm T-2 extension #1508154 because otherwise the SC-T Adapter wouldn't fit next to the 2inch Clicklock. If you look closely to the second image, you will see what we mean. If the SC-T Adapter would be closer to the prism body, it would touch the 2" ClickLock clamp.
    https://assets.baader-planetarium.com/media/extendware/ewimageopt/media/inline/a7/c/baader-prism-diagonal-t-2-90-32mm-767.jpg
    https://assets.baader-planetarium.com/media/extendware/ewimageopt/media/inline/cd/1/baader-prism-diagonal-t-2-90-32mm-c63.jpg
    Answer by: Baader Web Team (Admin) on Mar 7, 2023 7:28:00 AM
  448. Rated: 8
    5/7/2017 12:16 PM Baader M68 Tele-Compendium
    What material used to make Baader M68 Telecompendium; Universal Filter Holder Assembly? Concerned about long term galvanic corrosion affecting components if any steel used / mating surfaces. Telescope not protected against atmospheric humidity.

    Answer rated: 25
    Used material is anodized aluminum throughout
    Answer by: Baader Web Team (Admin) on May 8, 2017 8:23:00 AM
  449. Rated: 8
    4/16/2018 8:31 PM Baader Sky Surfer V illuminated finder
    Will the DSLR hot-shoe adapter that works with the Sky-surfer III, work with the Sky-surfer V? If not, where can I obtain a hot-shoe adapter for the Baader Sky-surfer V?
    Thanks for any information.

    Answer rated: -10
    You cannot mount the SkySurfer V on the hot-shoe which can take the SkySurfer III. We don´t know a solution for it but fear that the big
    SkySurfer V couldbe too heavy for it and may damage the camera body.
    Answer by: Baader Web Team (Admin) on Apr 17, 2018 4:53:00 PM
  450. Rated: 8
    11/27/2021 4:50 PM Baader T-2 Stardiagonal (Zeiss) Prism with BBHS ® coating (T-2 part #01B)
    Hello! Can I photograph through this 2" diagonal if I have an APS-C matrix?

    Answer rated: 0
    Yes this will work, but generally we recommend to place the camera directly in the light beam of the telescope without a mirror in between.
    Answer by: Baader Web Team (Admin) on Nov 29, 2021 9:09:00 AM
  451. Rated: 8
    12/12/2019 10:08 PM Steeldrive II Motor Unit
    Is it possible to operate the Steeldrive II with just ASCOM? I am doing that with the old classic Steeldrive.

    Answer rated: 14
    Yes, the SteelDrive II can be operated via ASCOM for the use in 3rd party programs like MaximDL, APT etc.
    The ASCO Driver is installed together with the SteelGoII software.
    Answer by: Baader Web Team (Admin) on Dec 13, 2019 8:31:00 AM
  452. Rated: 8
    12/11/2021 12:18 PM Baader Pan 3 "/ EQ Dual clamp 230mm (for Losmandy and Vixen-standard)
    How do I mount this piece on a AZ-EQ6 mount and what kind of screws requires? Are all the pieces included?

    Answer rated: -5
    Unfortunately we don´t know that, we have no template of the AZ EQ6 head
    Answer by: Baader Web Team (Admin) on Dec 13, 2021 8:49:00 AM
  453. Rated: 8
    12/12/2021 9:31 PM 2" Glasspathcorrector® 1,7x for Newtons incl. T-2 change ring
    What is the Newtonian telescopes' F-ratio range for which the Baader 2" Newton gpc is designed? Will it work with really fast Newtonians, like F/3.5 or below? Will the GPC cause vignetting at such F-ratios?

    Answer rated: 5
    When the GPCs were designed f/3.5 Newtonians were not very common. Using a GPC at this f-range will likely cause some vignetting (not to speak of residual uncorrected coma). However we are confident since never ever had we receivded complaints about unpleasing results.
    We can´t say though if this is due to so very few people using this combo or if those that are utilizing the GPC in this configuration do accept the possible downsides. At any rate - in order to get focus so far out on an f/3.5 the real compromize will be in the position and size of the secondary
    Answer by: Baader Web Team (Admin) on Dec 13, 2021 8:45:00 AM
  454. Rated: 8
    10/13/2023 10:51 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Please clarify the dimensions of the 37mm Clicklock Extension 2956237:
    1. The length of the barrel: a posted answer says it is ca. 24mm.
    2. The overall length of the extension: a posted answer says it is 60mm.
    3. The problem with these answers is that 37mm + 24mm = 61mm, not 60mm.
    4. How deep a 2" barrel can be inserted into the 37mm Clicklock Extension? I don't believe this information has been posted in an answer yet.

    Thank you very much!

    Joseph Guth

    Answer rated: 4
    The total length is ca. 60mm, the nosepiece ca. 23.3mm and the clamp 36.4 mm. So, the difference in length is caused by variations in the measurement.
    A 2" eyepiece can be inserted ca. 30.5 mm.
    Answer by: Baader Web Team (Admin) on Oct 18, 2023 1:05:00 PM
  455. Rated: 8
    3/27/2023 8:00 AM Research Grade H-alpha 0.4x Telecompressor 2" for Solar Spectrum
    Dear Baader, is possible to use the reducer for H alpha visual observations or isnjust a photographic togliere? Thanks!

    Answer rated: 1
    Its more a photographic tool. You can use it visually but its not very satisfying because you see an obstruction on the outside and the image is more concentrated and therefore brighter which affects the visual surface contrast
    Answer by: Baader Web Team (Admin) on Mar 27, 2023 8:12:00 AM
  456. Rated: 8
    5/29/2018 12:40 PM Baader 2" ClickLock Diagonal Mirror
    When mounting the diagonal on Celestron Edge HD 8" SCT, what's the optical path difference between:
    - Using #2956220 Clicklock-SC
    - Directly attaching the diagonal to the telescope using #245827 SCT lockring?

    Answer rated: 21
    To mount the star diagonal onto the OTA with the locking ring inbetween you have to unscrew the 2" nose piece anyway and also the ClickLock
    from the star diagonal body. Because of the mirror locl knobs there is no other way to mount it, also the panning is limitted by the mirror lock
    knobs and/or the focus wheel.

    When using a regular SC-ClickLock 2956220 and the star diagonal as it is you´re better according the back focus length of the EdgeHD.

    Answer by: Baader Web Team (Admin) on May 29, 2018 4:35:00 PM
  457. Rated: 8
    11/4/2020 6:11 PM Baader Tripod Adapter Flange for NexStar SE / EVO
    You mention Vixen tripods. Will this adapter fit the standard Vixen Super/Great Polaris/CG-5 tripod hub?

    Answer rated: -2
    It works e.g. with the tripods of CG-5, HEQ-5, Vixen Great Polaris (DX), but not with the smaller base of the older Vixen SuperPolaris DX, as the SP-DX has got a much smaller base pin.
    Answer by: Baader Web Team (Admin) on Nov 5, 2020 8:41:00 AM
  458. Rated: 8
    5/16/2021 2:57 PM Baader Heavy Pillar (BHP) modal steel pillar, payload capacity upto 600kg, custom made
    To check if this pier is suitable for my concrete pad, what is the diameter of the four drilled holes at the bottom plate and the distance between (center to center) of drilling holes (I guess these are equal squared)?

    Answer rated: -3
    Kindly please note that these pillars are "subsidized" in price as they only are internded to be a necessary solution when ordering a mount from Baader Planetarium. We do not offer this pillar as regular product, unless it is being ordered in conjunction with a 10 Micron or Planewave-mount.
    Answer by: Baader Web Team (Admin) on May 17, 2021 9:36:00 AM
  459. Rated: 8
    11/12/2017 12:38 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    I intend to place your ClickLock eyepiece holder on my personal construction telescope.
    The M64 (Takahashi) or the M60 (vixen) model could suite . But I do not have their thread pitch.
    What is the thread pitch of the M64 ClickLock (Takahashi ref # 2956264) and the M60 ClickLock (Vixen, ref # 2956260) ?

    Thank you.

    Answer rated: 54
    Both ClickLocks M60 and M64 are made with a 0,75er pitch and fits with Takahashi and Vixen.
    Answer by: Baader Web Team (Admin) on Nov 13, 2017 12:51:00 PM
  460. Rated: 8
    11/21/2018 12:13 PM DADOS Slit – Spectrograph
    I am interested in buying a Dados spectrograph. Which of the CCD/CMOS cameras available today would you recommend to use with it?

    Many thanks

    Eric
  461. Rated: 8
    4/21/2020 1:32 AM Universal Alan Gee II - Telecompressor (UAG II)
    Can it be used in the Takahashi Mewlon 180c? With Baader T Adapter (BTA) for SC and MAK Telescopes (T-2 part # 21). The Mewlon to S / C converter would also be used in the telescope of course.

    Answer rated: 9
    The item was developed for Schmidt Cassegrain Telescopes from Celestron and the optical properties of these telescopes are the basis of its design. At other types of optics the UAG II produces a very clear astigmatism and - there is no way to reach focus
    Answer by: Baader Web Team (Admin) on Apr 21, 2020 11:06:00 AM
  462. Rated: 8
    11/12/2020 1:01 PM Baader Multi-Purpose Vario Finder 10x60 (single or with MQR-IV finder holder)
    Is it possible to attach a linear focuser along with the MaxBright binoviewers to the Vario-Finder?

    Answer rated: -16
    Not without highly modifying it - it has got a focal length of 250mm, the binoviewer requires about 110mm of optical path, and even with the 2.6x glasspath corrector, it still needs ca. 65mm - plus a star diagonal, which adds another 35mm or more. So, the star diagonal needs to be less than 15cm behind the lens. We do not have a 1.25" standard focuser which is sturdy enoughto carry high loads - and a binoviewer plus eyepieces is heavy and long. That's why we use the simple, but sturdy focusing by moving the whole tube (when used as a finder or with a camera, you don't need to refocus often, and focussing can be done surprisingly fine).

    And if you shorten the tube to attach another focuser, you might loose light because the beam of light is vignetted. This is not a modification which we would try.
    Answer by: Baader Web Team (Admin) on Nov 13, 2020 10:43:00 AM
  463. Rated: 8
    9/11/2021 5:25 PM Baader S-II Narrowband-Filters (6.5nm) – CMOS-optimized
    Is the Baader S-II 2" Narrowband-Filter (6.5nm) – CMOS-optimized the same as the discontinued Baader S-II 8nm CCD Narrowband-Filter 2" would the CMOS optimised version be parfocal with the older standard CCD versions of this filter?

    Answer rated: 9
    If your optics is so well color corrected that parvocality only means to keep the filter thickness the same as befoire, then indeed the new CMOS-optimized filters are parfocal to all Baader-filters as we try to keep the substrate thickness consistent troughout all our filters.
    Otherwise we want to confirm that the new CMOS-optimized filters are on a much higher level of coating technology compared to the previous ones.
    Answer by: Baader Web Team (Admin) on Sep 13, 2021 8:34:00 AM
  464. Rated: 8
    6/15/2018 3:39 AM Baader Hyperion Zoom M43 / SP54 Adapter
    Will this work on the Baader Hyperion Zoom Mark 1?

    Answer rated: 26
    Right now there are three different Hyperion Zoom eye pieces existing - the Zoom, the Zoom Mark III and Mark IV. The first generation has no
    M43 thread but only SP54 so you don´t need this adapter. Thank you for the hint - we will change the description of this item.
    Answer by: Baader Web Team (Admin) on Jun 15, 2018 9:01:00 AM
  465. Rated: 8
    4/27/2020 7:47 PM Baader 36mm Hyperion Aspheric 2" Eyepiece
    Is this eyepiece compatible with a Celestron C8HD? An astronomer told me that this piece may not be a good choice for the C8HD's internal corrector.

    Answer rated: 8
    So far, we had no complaints about the EdgeHD and the Hyperion eyepieces. On the contrary, we are often surprised how non-problematic these optical systems are, as many photographers use the telescope with an additional focuser and thus place the camera at wrong distances, and are still happy with the results.

    So, after all that we have seen or heard, there is no problem, and we can – and do – recommend them for the EdgeHD, too.
    Answer by: Baader Web Team (Admin) on Apr 28, 2020 10:05:00 AM
  466. Rated: 8
    11/17/2020 12:44 AM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    Is there an adapter that will fit the male threads of Celestron 925 Edge HD on the rear cell and also fit the back of the @"BDS-SC female threads with the 2" adapter removed.
    Second question: Is this advisable?
    Thank You for any information that you may provide.

    Answer rated: 19
    The 2" BDS-SC Baader Diamond Steeltrack® Focuser includes adapters for both the 2"-SC-thread of the smaller Celestron SC/EdgeHD as well as for the larger 3.3" thread of the larger models up to the C14. So, you can easily install it.

    It's length is between 82 and 112 mm, the optimum back focus of the EdgeHD925 is 146,05mm from the end of the 3.3" thread. For photography, you should try to bring the camera into a position as close as possible to that distance. Visual use is less critical, although 2" star diagonals usually require about 11cm of optical length (prism diagonals need a little bit less).

    We know of several users who use the SteelTrack and are satisfied. We just wouldn't recommend it in combination with the Celestron reducer, as it is designed for the specified distances to both telescope and camera.
    Answer by: Baader Web Team (Admin) on Nov 17, 2020 1:18:00 PM
  467. Rated: 8
    5/23/2021 1:28 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Can I temporarily remove the silver knurled lever from the clamp wheel of my #2956220 ClickLock? Is it possible or even advisable?
    (Further detail: The lever hits my Celestron Focus Motor. So I have to remove the Focus Motor before I can install or remove the ClickLock. If I could temporarily remove the lever, I could fully rotate the ClampLock with the focus motor in place.)

    Answer rated: 20
    Unfortunately the removal of the lever is not provided for by design, it is glued in place and even if it were removed, the ratchet function still remains.
    You could "unscrew" the lever by force, but we don't recommend it.

    However, you can turn the whole head part of most ClickLock clamps - like the SC-clamp 2956220 - together with the lever into a comfortable position so that it does not interfere - see below linked PDF instructions.

    https://www.baader-planetarium.com/en/downloads/dl/file/id/1559/product/3030/adjusting_the_clicklockr_lever.pdf
    Answer by: Baader Web Team (Admin) on May 25, 2021 10:00:00 AM
  468. Rated: 8
    5/30/2021 4:23 AM Baader M68 Tele-Compendium
    For SolarSpectrum ASO with binoviewer use, do you recommend Telecompendium instead of T2 connection?
    Also, which part does the TZ-4 connect to inside the Telecompendium, is it T-2 Part #16? Thank you!

    Answer rated: 16
    The Telecompendium is much more stable therefore we recommend for such a big and heavy filter, especially in combination with a big camera, the Telecompendium. Yes, its part #16 that connects to the TZ inside
    Answer by: Baader Web Team (Admin) on May 31, 2021 8:46:00 AM
  469. Rated: 8
    1/20/2022 1:01 PM Baader 2" to 1¼" ClickLock Reducer (T-2 part #15B)
    Follow up question i dont think my original question was answered. It is mentioned here that you can use T2-15B as an eyepiece holder in a T2 diagonal which then doesn't allow it to freely rotate as you mentioned. This is why i asked if the Lever is adjustable with the screw that you can see directly across from the Lever itself. Please advise if it possible to loosen this to adjust the outer ring position? I realize that T2-08 is an option but it doesn't have the lever!

    Answer rated: -2
    Thanks for your follow up. You are right, we the female T-2 thread this clamp can be used for T-2 diagonals as you described. However unfortunately it is not possible to reposition the lever here as with other 2" ClickLock clamps. The screw you described is cemented and needed for the ClickLock functionality, it can't be removed.
    Answer by: Baader Web Team (Admin) on Jan 20, 2022 1:50:00 PM
  470. Rated: 8
    10/4/2021 4:48 PM Baader D-ERF Energy Rejection Filter (75 - 180mm)
    How can I tell which side is which on an older erf filter I have. I cannot tell which side is gold or blue. I CAN tell that one side is more reflective on its front surface giving a crisper reflection than the other side. Should that side face the sun??

    Answer rated: -7
    Yes, that is correct. The more reflective side should face the sun.
    Answer by: Baader Web Team (Admin) on Oct 5, 2021 9:21:00 AM
  471. Rated: 8
    8/31/2020 4:27 PM 2" BDS-NT Baader Diamond Steeltrack® Focuser
    I need help choosing between # 2957210 and # 2957230

    Answer rated: 35
    It depends on the telescope you're using. BDS-RT #2957210 is for refractors, BDS-NT #2957230 is for Newtonians.
    Answer by: Baader Web Team (Admin) on Sep 1, 2020 9:23:00 AM
  472. Rated: 8
    8/3/2018 4:24 PM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    The previous version has the M35/M45 Adapter ring to enable mount on Celestron/Zeiss spectives. May I use the same part to mount Mark IV on my old Celestron Ultima spective or the current 1 3/8" Spoting scope thread ring? Or do you have any other way how to mount Mark IV on Celestron Ultima/Acuter Natureclose scope?
    Thank you, Vit

    Answer rated: -27
    The 1 3/8" thread fits onto the Celestron Ultima spotting scopes and similar models, it's almost the same as the old M35 thread. So, for these spotting scopes, nothing has changed.
    For Zeiss Diascope and the Mark IV Zoom, you need #2454831.
    Answer by: Baader Web Team (Admin) on Aug 6, 2018 8:12:00 AM
  473. Rated: 7
    2/4/2022 3:51 PM Baader UV/IR-Cut / L-Filter – CMOS-optimized
    Is Baader UV/IR-Cut / L-Filter – CMOS-optimized suitable for solar observation as extra safety combined with Baader Astrosolar film ?

    Answer rated: 9
    Yes, its a good additional safety to block UV and IR from your eye or camera. And it will not influence the image quality negatively
    Answer by: Baader Web Team (Admin) on Feb 4, 2022 3:58:00 PM
  474. Rated: 7
    6/20/2022 9:02 AM Baader Q-Barlow 1.3x/ 2.25x
    What is the focal length of the barlow or is the given magnification correct? I measured some photos and got different results.

    Answer rated: 3
    The focal length is 45.5mm, the magnifications given are correct for the Baader Classic eyepieces and all other eyepieces where the field sop is 2mm inside of the 1.25" nose piece. The magnification factor of a Barlow lens depends on how far it is from the field stop of the eyepiece or the camera sensor. So if your camera is in the wrong distance, it will deliver a different magnification. We have now explained this more extensive in this FAQ.
    Answer by: Baader Web Team (Admin) on Jun 20, 2022 9:03:00 AM
  475. Rated: 7
    2/10/2023 7:34 PM Baader 10mm Hyperion 68° Modular Eyepiece
    If I add a 28mm Fine tuning Ring -to my 10 mm Hyperion what is the new focal length

    Answer rated: -2
    The resulting focal length would be 7.1mm. Please check out this graphic with all different combinations for all our Hyperion eyepieces: https://www.baader-planetarium.com/media/wysiwyg/product_info/hyperion-finetuning-en.jpg
    Answer by: Baader Web Team (Admin) on Feb 13, 2023 7:40:00 AM
  476. Rated: 7
    7/3/2021 8:28 AM StarAid Revolution Standalone Autoguiding - Revision A
    Is the Staraid Unit compatibel mit iOptron CEM 25 Montierung ?

    Answer rated: 2
    Wir haben es zwar selbst noch nicht ausprobiert aber wenn die Montierung einen normalen Autoguider Eingang hat sollte es lt. Hersteller funktionieren
    Answer by: Baader Web Team (Admin) on Jul 5, 2021 8:14:00 AM
  477. Rated: 7
    9/17/2020 10:01 AM Baader Wide-T-Ring Nikon Z (for Nikon Z bajonet) with D52i to T-2 and S52
    Can I attach the T-Ring to a Takahashi FS-60CB with the Multiflattener 1.04x which has a M52x0.75 thread and requires a backfocus of 87.5mm? Which parts would I need?
    thanks

    Answer rated: 1
    The Nikon Z-bayonet has got a flange distance of 16mm, the Wide T-ring adds 8.3mm. So you have 87,5-24,3=63,2mm remaining for adapters. This should be no problem - but we do not have an adapter from M52 to a more common thread.
    Answer by: Baader Web Team (Admin) on Sep 17, 2020 12:53:00 PM
  478. Rated: 7
    11/2/2022 11:12 PM Baader Filterbox, allseitig stapelbar
    What's the internal height of the boxes? I'd like to use it for the Double-Polarizing Filter (#2408344), which is 17.2 mm thick. Does it fit?

    Answer rated: 0
    The internal height of the box without any inlays is 15mm. Unfortunately the Double-Polarizing Filter will not fit in.
    Answer by: Baader Web Team (Admin) on Nov 3, 2022 7:54:00 AM
  479. Rated: 7
    2/9/2018 11:44 AM Fluorit Flatfield Converter (FFC) / 3x-8x – Weltbeste Barlowlinse
    Two Questions: Will this Barlow be effective at 2X? How can this lens provide up to a 90mm diameter image circle when the lens itself is only 42mm(?) in diameter and the light path is convergent, not divergent, between the lens and the image plane?

    Answer rated: 31
    The FFC was designed by Carl Zeiss, to cover the full 90 mm image diagonal of a 6x6 emulsion film camera and provide a flat field. This is especially valid at the 4x factor.

    A barlow lens makes individual light cones narrower, but increases the off axis light beam angles strongly since it magnifies the image which leads to a divergent field of light. So with its 4x magnification the projected field increases 4 times also, being designed to project the advertised 90mm in perfect quality. Although no regular glass combination would allow to design a divergent bundle of light to emerge from the lens groups and still retain the full apochromatic properties of a precision objective lens - such as the APQ-lenses from Carl Zeiss were. It indeed does take two differently radied cemented groups of genuine Calciumfluorite (CaF2) - crystal with equally exotic partner glasses, to retain the full apochromatic properties. There is no other lens design existing having the same complexity.

    However - the days of emulsion film are gone since long - and modern chips are much smaller still. For this reason the factor could be reduced even to 2,5x instead of 4x by moving the image plane much nearer towards the exiting lens surface than those ~150 mm required for the 4x factor. In this way, the perfectly flat and apochromatic field would be reduced to only cover a 25 mm image circle with perfection.
    When aiming to 2x it can be that the lens surface has to be extremely near to the sensor, so any dry chamber or else could hinder this.
    Answer by: Baader Web Team (Admin) on Feb 20, 2018 9:45:00 AM
  480. Rated: 7
    2/16/2023 6:47 PM Baader 36mm Hyperion Aspheric 2" Eyepiece
    Baader 36mm Hyperion Aspheric 2" eyepiece being manufactured with the safety kurfs on the 2" barrel?

    Answer rated: 8
    No, the Baader Hyperion Aspheric eyepieces still feature the standard nosepieces with undercut. We will gladly forward this idea to the design department though, to consider a development for the next production run.
    Answer by: Baader Web Team (Admin) on Feb 17, 2023 7:18:00 AM
  481. Rated: 7
    10/14/2016 11:03 AM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Will this item (SC) fit the thread of a Meade LX90 ACF 12" telescope please? I believe the thread is slightly different from the Celestron thread.

    Answer rated: -35
    The way we cut the thread it should work - it has on many other customers Meade-OTAs. We can't guarantee it however, since we don´t have Meade telescopes here to test this.
    Answer by: Baader Web Team (Admin) on Oct 24, 2016 9:04:00 AM
  482. Rated: 7
    9/13/2023 12:51 PM Baader Eyepiece 1¼"/36.4mm (T-2 part #11)
    Is it possible to unscrew the part where it is written "Focusing Eyepiece older 1 1/4"/T-2".
    I need only this part, in order to screw it directly to the focuser tube (which is a 1 1/4" tube)

    Thanks in advance.

    Answer rated: 3
    Unfortunately it is not possible to remove this part.
    Answer by: Baader Web Team (Admin) on Sep 15, 2023 11:16:00 AM
  483. Rated: 7
    9/13/2023 10:28 PM Baader T-2 Stardiagonal (Zeiss) Prism with BBHS ® coating (T-2 part #01B)
    Would this fit well a Mewlon 210 with an attached SteelTrack focuser, to be used with TeleVue 2” eyepieces?
    What other parts would I need to be able to mount it (and rotate it) on the focuser?

    Answer rated: -1
    The Mewlon should have a back focus of 210 mm, as far as I can see.

    The 2" BDS-SC Baader Diamond Steeltrack® Focuser # 2957220 has got a length of 93-123mm (with the included 2" clamp)
    The 2" BDS-SC Baader Diamond Steeltrack® Focuser # 2957220 has got a length of 3mm and fits onto the T-2-star diagonal. You can rotate it in the SteelTrack easily by opening the eyepiece clamp of the SteelTrack.
    The star diagonal has got a length of 38,5mm
    A 2" eyepiece clamp like Baader 2" ClickLock T-2 (M42i x 0.75) clamp #2956242 adds another 36 mm

    This makes a total length of 170,5-200,5mm, so that should be no problem even if you might need another adapter for the thread on the back of the Mewlon (I'm not sure which threads are used on the Mewlon and if another adapter to the SC-thread is needed for the SteelTrack). If you need to place the eyepiece farter away, you can use T-2-extensions at the star diagonal, if necessary. Two T-2 / 15 mm Extension Tubes #1508154 would bring you into the optimum distance to place the eyepiece in a distance of 200-230mm, well around the 210mm of perfect back focus.
    Answer by: Baader Web Team (Admin) on Sep 14, 2023 2:30:00 PM
    Answer rated: -1
    If the Mewlon is already equipped with an Steeldrive focuser, you can easily fit in the mirror with the 2" barrel. Unfortunately we do not know the focus travel of your telescope, therefore we cannot say for sure which eyepieces will work and which will not.
    Answer by: Baader Web Team (Admin) on Sep 14, 2023 2:22:00 PM
  484. Rated: 7
    4/5/2021 7:48 PM Expansion Kit for QHY 5-III-462C
    Can I mount QHY 5-III-462C Expansion Kit on a QHY5L-II-C camera?

    Answer rated: 10
    Yes, this works!
    Answer by: Baader Web Team (Admin) on Apr 6, 2021 4:47:00 PM
  485. Rated: 7
    4/20/2017 6:45 PM Baader Stronghold Tangent Assembly
    I just received a Baader Stronghold Tangent. I cannot remove the locking dowel it's holder. What is the proper way to remove the locking dowel from its holder?

    Answer rated: -28
    The locking dowel should be removable with light force. Alternatively you could loosen the M4 headless set screw a bit, which is hold the locking dowel. You can access it from the side
    Answer by: Baader Web Team (Admin) on Apr 21, 2017 9:39:00 AM
  486. Rated: 7
    3/2/2023 2:41 AM Baader Fringe Killer Color Correction-Filter
    I hav e a vixen 140SS with lots of chromatic aberration when using my asi2600mm with colour wheel. My questions are 1) can I use this in front of my filter wheel and using the RBG filters? 2) Would a good quality set of RGB filter do a better job than my ZWO filters?

    Answer rated: 6
    You can use this filter in front of your filter wheel, no problem.
    It only affects the blue filter, transmission for green and red is so high that you will not notice much of a difference.
    For the blue filter, it affects only half of the wavelengths which pass through the filter: The longer wavelengths pass through it almos unaffected, while the shorter wavelengths, where the blue halo is the strongest, will be dimmed by ca. 50%.
    We do not know how good the ZWO filters are, but we can tell you that the transmission spectrum is on the website of each of our filters and that they let close to 100% of the light through, while they are also good against reflections and Halos.
    By the way, that is the only problem which may happen if you put another filter in front of the filter wheel: There may be reflections/halos around brighter stars - but the risk is low.
    Answer by: Baader Web Team (Admin) on Mar 6, 2023 12:25:00 PM
  487. Rated: 7
    8/2/2022 1:24 PM Baader V-Dove Tail Clamp, Diam. 70mm, with one clamp screw
    Could this clamp safely hold a 5 kg tube?

    Answer rated: -12
    Yes it will hold a 5kg tube easily.
    Answer by: Baader Web Team (Admin) on Aug 2, 2022 2:13:00 PM
  488. Rated: 7
    3/2/2023 4:00 PM Baader M68-Tilter
    What is the in-screw depth of the female threads and what is the out-screw depth of the male threads?

    Answer rated: 2
    The length of the male M68 thread is 5mm and the depth of the female thread is 7,5mm.
    Answer by: Baader Web Team (Admin) on Mar 15, 2023 10:21:00 AM
  489. Rated: 7
    6/13/2023 4:59 PM Baader 2" ClickLock eyepiece clamps (from T-2 to 4,1")
    Is the inverter ring used on the ClickLock M54a x 0.75 clamp permanently attached, or can it be removed with a proper spanner - thus creating a M54i x 0,75 ClickLock clamp (# 2956253) ?

    Answer rated: -9
    Unfortunately we have to inform you that this inverter ring is indeed permanently attached, to guarantee a flawless function of the clamp for its meant purpose.
    Answer by: Baader Web Team (Admin) on Jun 14, 2023 7:24:00 AM
  490. Rated: 7
    3/21/2022 10:50 PM Baader Q-Barlow 1.3x/ 2.25x
    I have three Baader Hyperion eyepieces 8mm, 13mm and 24 mm. Should I get this Barlow or the Hyperion zoom Barlow? I’m not planning on getting the zoom in the future but who knows what will really occur. Thanks!

    Answer rated: 25
    In this case, we'd recommend the Q-Barlow - both Barlows are of good quality, but the Q-Barlow is easier to handle and does not need to be screwed onto the eyepiece (but it doesn't have a brass clamp ring, only a clamping screw). Please note that the Q-Barlow can't be used in 1.3x configuration - this is only possible with eyepieces where there are no lenses in the 1.25"-barrel, as the Q-Barow can't be screwed into the 1.25"-barrel of the Hyperions.
    Answer by: Baader Web Team (Admin) on Mar 23, 2022 7:24:00 AM
  491. Rated: 7
    5/4/2018 11:04 PM Alan Gee Telecompressor Mark II (T-2 part #20)
    Does the Alan Gee come with the spacer tubes described in the manual or are those purchased separately?

    Thank you.

    Answer rated: 26
    The two 19mm spacer tubes are included; only the various T-2-extensions are not included.
    Answer by: Baader Web Team (Admin) on May 7, 2018 8:21:00 AM
  492. Rated: 7
    8/17/2019 8:32 PM 2" MPCC Mark III (Multi-Purpose Coma Corrector for Newtons)
    I have a ZWO ASI294MC Pro, which has 6.5mm of back focus, and I want to connect it to my MPCC. In your answer to Keith Krayanek's April 2018 question about a similar camera, you recommended spacers totaling 55mm. But adding 55m to 6.5.mm would equal 61.5mm. Is this number correct? Also, with a M48 mounting surface, do I need a total of 57.5mm of back focus (6.5mm + 51.0mm) or 64mm (6.5mm + 57.5mm)? Thank you.

    Answer rated: 4
    The PDF at https://www.baader-planetarium.com/en/downloads/dl/file/id/343/product/3004/mpcc_backfocus_from_t_2_and_m48_mounting_surfaces.pdf should make it clearer.

    In the answer to which you refer, we wanted to make clear that if the customer uses the ZWO-T-Aapter which gives a backfocus of 17.5mm, he can use the VariLock variable T-adapter to get a complete distance of 55mm from the T-2-collar.

    So, if you have a camera with T-2-thread and 6.5mm of backfocus (with the T-2-thread), you ned an adapter with a length of 48.5mm. This can be done with a combination of Baader T-2 / 15 mm Extension Tube (T-2 part #25A) # 1508154 and Baader VariLock 46, lockable T-2 ExtensionTube 29-46mm (T-2 part #25V) # 2956946, which is set to 33.5mm.
    Answer by: Baader Web Team (Admin) on Aug 19, 2019 12:20:00 PM
  493. Rated: 7
    8/18/2022 5:14 PM Baader Wide-T-Ring Sony E/NEX Bayonet with D52i/M48 to T-2 und S52
    Can I use this adapter to connect a sony alpha 6000 (e mount) to a skywatcher MAK127 telescope without further adapters?

    Answer rated: 12
    With this T-Ring, your camera will fit to all telescopes with a T-thread - that is a male M42x0.75-thread. At least the current versions of the Mak127 should already have this thread, so you don't need anything else - but please check your telescopes, as the design may have changed over the years.
    For telescopes which do not have this thread (or a seperate T-adapter), you can use Baader 1¼" T-2 nosepiece with Safety Kerfs # 2458106 for 1.25" focusers or Baader 2" / T-2 (M48) nosepiece with Safety Kerfs # 2458130 for 2"-focusers.
    Answer by: Baader Web Team (Admin) on Aug 19, 2022 8:54:00 AM
  494. Rated: 7
    5/12/2018 10:14 PM 2" BDS-SC Baader Diamond Steeltrack® Focuser
    Do you think that 2" BDS-SC Focuser can replace the Zero Image Shift Microfocuser on 10" LX-200-ACF (GPS + AutostarII / Dated 2009) from Meade ? Or can you propose another solution with fine-focus mechanism, even it is in manual mode ? Thank you very much for your answer.

    Answer rated: 3
    Yes, the BDS-SC will work on a Meade LX-200. We actually have a testreview with images for this, unfortunately only in german language. Please use Google Translate or a similar tool to translate it. Here is the PDF: https://www.baader-planetarium.com/de/downloads/dl/file/id/174/product/2856/bds_sc_diamond_steeltrack_am_meade_lx_200_teleskop.pdf
    Answer by: Baader Web Team (Admin) on May 14, 2018 2:51:00 PM
  495. Rated: 7
    12/15/2022 7:48 PM Baader Hyperion 68° Eyepiece Set (Starter)
    Hi, I am going to buy the Hyperion Starter set and use it with my Orion SkyQuest XT10 - and also want to connect with my Lumix FZ300 (52mm filter).
    Please advise which rings I should by for this to work.
    Best regards, Bob

    Answer rated: 10
    Please check out our Hyperion Application manual and/or our Digiscoping Brochure. This should contain all the information you need:
    https://www.baader-planetarium.com/en/downloads/dl/file/id/134/product/0/hyperion_eyepieces_application_examples.pdf
    https://www.baader-planetarium.com/de/downloads/dl/file/id/443/product/0/digiskopie_kameradaptionen_f_r_afokale_fotografie_und_okularprojektion.pdf
    Answer by: Baader Web Team (Admin) on Dec 16, 2022 7:22:00 AM
  496. Rated: 7
    7/26/2020 10:08 AM Baader heavy-duty 8" double mounting plate, for up to 100kg
    Is this plate compatible with the 10 Micron clamps ie if you have two 10 Micron maxi clamps is the hole spacing on this plate compatible?
    Simon

    Answer rated: 19
    The 8" double-mounting plate is predrilled for the 8" Planewave Clamp as well as for Baader PanEQ clamps, it is not compatible for the 10Micron Maxi clamps by default.
    We could add this drillings by request, but these holes would not be black anodized like the rest of the plate, furthermore it would only be possible at the very edge of the plate and not be moveable. Also, since this would be a custom producion, it would take approximitaly four weeks.
    Answer by: Baader Web Team (Admin) on Jul 27, 2020 1:37:00 PM
  497. Rated: 7
    10/30/2020 3:36 PM Baader Wide-T-Ring Nikon Z (for Nikon Z bajonet) with D52i to T-2 and S52
    What do I need to connect my z6 to my Celeste on edge11?

    Answer rated: 11
    The Nikon Z has got a flange distance of 16mm, the Wide T-ring adds another 8.3mm, so it's backfocus is 24.3mm.

    The Celstron M48-adapter #93622 is designed for 55mm of backfocus, so you need another 30.7mm of extension rings. The Celestron M48 adapter set #93618 contains a 30mm ring, which is close enough - the missing 0,7mm for perfect distance can be filled with Baader M48 Fine-Adjustment rings (0,3 / 0,5 / 1 mm) - https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/m48-adapter-system/m48-fine-adjustment-rings-(03--05--1-mm)---aluminium.html . You should be within 0.5mm of the optimum backfocus distance for best images, so the 0.5mm-ring will be fine.

    You might also use variable T-2-extensions, but for a full-frame camera, we recommend the M48-system to avoid vignetting.
    Answer by: Baader Web Team (Admin) on Nov 2, 2020 11:23:00 AM
  498. Rated: 7
    8/25/2021 10:02 PM Baader M68-Tilter
    Do you plan to provide the same tilt corrector with M42 or M48 thread instead of M68 ?
    If not, how can I adapt it on my photo set up with M42 or M48 thread ?
    Thank you !

    Answer rated: 16
    We are working on an answer to your question. Please keep an eye on our blog, there we will publish an post soon. Thank you for your patience.
    Answer by: Baader Web Team (Admin) on Aug 26, 2021 8:34:00 AM
    Answer rated: 1
    At the moment, we do not plan a smaller M48-unit, as the wider diameter allows for finer adjustments. So, at least in the near future, there will be no M48-version.

    But you can adapt the M68-tilter to M48 or T-2 as follows:

    Telescope with male T2a thread
    Baader Expansion Ring 2"a/T-2i with 1mm optical path length (T-2 part #28) # 2958242
    M68 to 2" UNFi Conversion Ring # 2458232
    Baader M68 Conversion Ring # 2458195
    Baader M68-Tilter # 2458170
    M68 to T-2 Conversion Ring # 2458233
    Eyepiece/camera with female M48-thread

    and for M48:

    teleskope male M48a thread
    2"a / M48i Zero-length reducing piece (zero optical length) # 2454834
    M68 to 2" UNFi Conversion Ring # 2458232
    Baader M68 Conversion Ring # 2458195
    Baader M68-Tilter # 2458170
    M68a to M48a Reducing piece # 2458229
    Eyepiece/camera with female M48-thread

    As the M48 reducing piece is zero-length, for better handling you may have to attach it to your camera first before attaching both to the tilter.
    Answer by: Baader Web Team (Admin) on Aug 26, 2021 10:41:00 AM
  499. Rated: 7
    12/17/2021 3:56 AM Baader H-alpha 35nm CCD Filter
    In one of you articles you said this filter can be used as ERF in front of an Ha prominence filter such as the Daystar Quark. I would like to know if this is possible for a refractor with f/8 focal ratio or F/5.6?

    Answer rated: 2
    You are referring to this article: https://www.baader-planetarium.com/en/blog/tips-for-choosing-an-energy-rejection-filter-for-h-alpha-observations/
    The best place for an ERF is always in front of the telescope, not inside of it. At a slower telescope, the energy density is not as high because of the larger image of the Sun, so it will won't get as hot at f/8 as at f/5.6.
    We did not perform durability tests with this filter on the sun, because we don't sell them as ERFs, although people use them successfully for this puprpose. So, we can't give any warranties on how long they will last at which f/ratios, but it should work at f/5.6, too. Anyway, we'd recommend that you take breaks during observations, so that the filter has got time to cool down again, and - just as with white-light observation - always cehck all filters before using them.
    Answer by: Baader Web Team (Admin) on Dec 20, 2021 11:37:00 AM
  500. Rated: 7
    4/12/2020 2:46 PM Carl Zeiss 1¼" Abbe Barlow lens 2x
    Do you have any transmission information for this barlow in the 300-400nm range? The transmission curve shown suggests a very steep fall off. We wish to offer a 2x barlow for imaging Venus with the U filter and this may or may not be suitable.

    Answer rated: 11
    The transmission in UV is only about 50%.
    Instead we would recommend our Q-Barlow with about 65% transmission:
    https://www.baader-planetarium.com/en/baader-q-barlow-2.25x--1.3x.html
    Answer by: Baader Web Team (Admin) on Apr 14, 2020 9:05:00 AM