Most Recent Product Questions
  1. Rated: 38
    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: 6
    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
  2. Rated: 32
    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 (, 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: 5
    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
  3. Rated: 22
    12/24/2016 2:48 AM Okular Eudiaskopisch 35 mm ED 1¼"
    Do you still sell this eyepiece?

    Answer rated: 2
    The last models of the 35mm Eudiascopic eyepiece are now reserved for use together with our Mark IV Binoviewer and are not available anymore for single purchase, we apologize.
    Answer by: Baader Web Team (Admin) on Mar 27, 2017 9:52:00 AM
  4. 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: -8
    Yes indeed, it is threaded for 2" (M48) filters.
    Answer by: Baader Web Team (Admin) on Oct 24, 2016 9:01:00 AM
  5. Rated: 18
    8/15/2017 1:03 AM Solar Viewer AstroSolar® Silver/Gold (1pc, 10pc, 25pc, 100pc)
    Am only ordering one pair. will it be here by the time of the Eclipse?

    Answer rated: 20
    We don't ship to the USA from our website - and even if we would, unfortunately you wouldn't get your Solar Viewer in time for the eclipse. Please inquire at US dealers.
    Alternatively, here is an option to observe the eclipse in full safety without buying any commercial product:
    Answer by: Baader Web Team (Admin) on Aug 15, 2017 9:56:00 AM
  6. Rated: 18
    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: -10
    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
  7. Rated: 18
    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: 43
    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:
    #2958052 Baader Lens-Adapter-Ring SP 54/ M52:
    Based on the SP54 thread, we offer many more adapters for various camera threads, our so-called Hyperion DT-rings.
    Answer by: Baader Web Team (Admin) on Oct 11, 2016 5:08:00 PM
  8. Rated: 16
    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: 9
    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
  9. Rated: 15
    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: -41
    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
  10. Rated: 15
    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: 19
    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
  11. Rated: 14
    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: 11
    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
  12. Rated: 14
    5/2/2017 10:18 PM Baader Metal V-bracket for SkySurfer III and V
    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: 0
    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
  13. Rated: 14
    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: 7
    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:
    Answer by: Baader Web Team (Admin) on Jan 9, 2017 8:26:00 AM
  14. Rated: 12
    3/7/2017 2:34 PM Baader 2" ClickLock eyepiece clamps
    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: -10
    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
  15. Rated: 12
    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: -7
    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
  16. Rated: 11
    11/10/2016 5:02 PM Mark V Großfeld (Giant)-Binocular
    What is the in focus requirement of the binoviewer

    Answer rated: 13
    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
  17. Rated: 10
    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: -3
    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:
    Answer by: Baader Web Team (Admin) on Sep 14, 2016 11:09:00 AM
  18. Rated: 10
    1/31/2017 5:42 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 Kowa TSN-883 spotting scope?

    Answer rated: 4
    Unfortunately this adapter is not available until now and we cannot confirm yet a definite date.
    However - all efforts done on the new Mark IV release, to aim at making this eyepiece adaptable onto most existing Spotting scopes.
    Sorry if we can not serve you right now. We will strive to do so in the future
    Answer by: Baader Web Team (Admin) on Feb 1, 2017 8:32:00 AM
  19. Rated: 9
    10/24/2016 3:33 PM BACHES Echelle-Spectrograph
    When I order the BACHES standard calibration set (Thorium-Argon lamp) instead of the Remote Calibration Unit RCU, can I use my existing LED flatfield screen at the front of the telescope for flatfielding BACHES echelle spectra?

    Answer rated: 3
    The RCU is a versatile calibration unit. In general: A flat unit is necessary to recognize the spectral orders for calibration, and to correct for pixel-to-pixel variations within the spectrum.

    If you use a flatfield unit in front of your telescope instead of the RCU, that unit should not have a green-blue emission gap. Why? For calibration of the ThAr spectrum, the calibration script of MIDAS scans the flatfield spectrum to recognize as much spectral orders as possible. Order detection could fail with a non-uniform flatfield illumination. That depeds on your given unit.

    Also important is the brightness of the flat unit in front of the telescope. It must be very bright to provide the same intensity level at the slit as the RCU which directly illuminates the slit of BACHES.

    Also, please consider remote control of the calibration unit. This can only be accomplished by the RCU which contains a LAN female connector for connection to your local network. A fixed IP address can be assigned. You are able to control the RCU with any web browser, the web interface is implemented in the RCU. The standard calibration set with ThAr lamp only can not be controlled remotely!

    We recommend the RCU to you, because we are sure that you will like the additional features as compared to the standard unit.
    Answer by: Baader Web Team (Admin) on Oct 24, 2016 3:34:00 PM
  20. Rated: 9
    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: -10
    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
  21. Rated: 9
    12/19/2016 5:34 PM VIP 2x modular barlow lens, visual and photographic
    I understand that the optically active element of the VIP-Barlow is the 2.6x glass-path-corrector lens referenced "4C" in the T2 system. Is that correct ? If not, Is the active element for sale alone ?

    Answer rated: -12
    Thanks for this question, to make it short: it is not correct. We did repeat it many times but somehow it is not getting noticed - the 2.6x glasspath-corrector (# 2456317) is NOT a barlow lens.

    The 2.6x glasspath-corrector is solely designed to provide the necessary backfocus for using binoviewers in conjunction with newtonian telescopes and refractor telescopes. For correcting for the huge amount of glass in our Mark V giant binoviewer (# 2456410) - and likewise in the newly designed Maxbright Mark II binoviewer that is still under preparation at this time.

    Both lens elements of the Baader 2x VIP-Barlow (# 2406101) and the 2.6x glasspath-corrector (# 2456317) do look quite similar when inspecting them by eye only (they use the same housing) - and we are very sorry that through the years this is always again creating confusion in the forums. However - we always again reiterate that the two products are not the same lenses and cannot be used for serving a dual purpose.

    In case you were ordering the 2.6x glasspath-corrector and would use this product as a 2x barlow lens, you would find out that it creates severe chromatic errors if used in this (wrong) mode. The same accounts if trying to use the 2x VIP-barlow-lens as glasspath-corrector in conjunction with a binoviewer - you would see color error and conclude that the lens were faulty.

    We never said that these two products may be used for the other purpose, but always again people look at them and conclude they were the same - which definitely is not the case. Both products work excellent if used for their specific purpose. But since they repeatedly are being (ab)used in either/or configuration, some people concluded both designs were flawed. Again - this definitely is not the case.

    Thanks for purchasing the VIP-Barlow if you want a barlow lens. We are sorry but the barlow-element alone is not available. If you intend to use a barlow element only that readily threads into regular 1 1/4" filter threads, we do recommend our Q-Barlow 2.25x Link (# 2956185).
    Answer by: Baader Web Team (Admin) on Dec 20, 2016 11:36:00 AM
  22. Rated: 8
    4/9/2017 10:17 AM Hyperion Zoom 2.25x Barlow lens
    Is there going to be a new barlow for the new Mark IV Zoom?

    Answer rated: 6
    No, the current Hyperion Barlow 2.25x works excellent with our new Mark IV Zoom.
    Answer by: Baader Web Team (Admin) on Apr 10, 2017 9:26:00 AM
  23. 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: 8
    Used material is anodized aluminum throughout
    Answer by: Baader Web Team (Admin) on May 8, 2017 8:23:00 AM
  24. Rated: 8
    11/25/2016 1:32 PM Baader PAN-EQ-Clamp V190 (EQ Standard)
    Will this clamp fit a Zeiss Telementor dovetail? I wish to fit my telescope to an Ioptron Mini Tower. Many thanks.

    Answer rated: 18
    Unfortunately not. Such a norm is only produced by Astro Physics anymore: DOVE 08
    Answer by: Baader Web Team (Admin) on Nov 28, 2016 9:06:00 AM
  25. Rated: 7
    3/12/2017 7:25 AM Research Grade TZ-3 Telecentric System (3x focal length)
    If using the TZ-3 with a 32mm CA SolarSpectrum ASO model is some light lost since the TZ-3 is designed to produce a 46mm output beam? If 'yes', light is lost, when used with a 32mm etalon can the rear lens of TZ-3 be moved closer to the front / input lens to produce an exit beam more closely matched to the 32mm CA of the ASO model Ha filter and thus produce a brighter image in an eyepiece?

    Answer rated: 6
    There is no light getting lost when using the TZ-3 on smaller sized etalons. In fact the TZ-3 offers the very same brightness with even a 19 mm sized etalon than the TZ-2 and TZ-4 - but the latter two simply are not able to cover the large field of a 46 mm etalon - like we offer in form of the research grade SolarSpectrum filters. All these three TZ-systems have a very similar focal length design, ranging between 200 to 250 mm. TZ-systems optically work best at such long FLs. We checked many optical designs to ultimately decide for these long FL-solutions. Trying to shorten the mechanics of the TZ_3 (or shortening on the FL) in any way will always result in a severe loss of optical performance.

    We have analyzed the optics inside the Quark for instance - and we must be too stupid maybe, but according to our calculation the resulting monochromatic spot diagrams look horrible. So yes - you certainly can try to trim down the TZ-optical principle in terms of shorter FL and small lens sizes. But we conclude that a lot of contrast (and image brightness) goes bust that way. So please do not try to move inward the exiting lens on the TZ-3 - the optical quality will be gone - and the warranty too.

    Better look into the solar telecompressor 0.4x that we had designed to work perfectly with the TZ-3. The image will be "very bright" as you end up with an f/10 beam when the incoming FL was set to f/10 as well.

    We will continue to look for alternative optical solutions for small etalons, but certainly it must be way better than what we find in the market right now.
    Answer by: Baader Web Team (Admin) on Mar 13, 2017 12:03:00 PM
  26. Rated: 7
    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: 4
    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
  27. Rated: 7
    1/28/2017 4:56 PM TurboFilm 127 x 51 cm, ND 0,1
    How is the film fitted to a telescope tube?

    Answer rated: 7
    You can easily create a filter cell from cardboard the same way as you can do it for our AstroSolar film. We have some illustrated descriptions at
    Answer by: Baader Web Team (Admin) on Jan 30, 2017 10:31:00 AM
  28. Rated: 6
    9/16/2017 5:33 PM Baader 2" ClickLock eyepiece clamps
    Which Baader 2" ClickLock should i choose for my meade lxd55 emc 127 mm refractor ?
    Thanks !

    Answer rated: 6
    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
  29. Rated: 6
    4/25/2017 2:58 PM Baader 2" ClickLock eyepiece clamps
    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: -13
    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
  30. Rated: 6
    5/14/2017 11:06 AM SolarSpectrum 0.7x Telecompressor 2"
    Which way round should the 0.7x telecompressor go in the optical chain? i.e. which is the front and back of this optically and how would I know how to orientate it?

    Answer rated: 7
    The longer 2" thread points towards the camera.
    Answer by: Baader Web Team (Admin) on May 15, 2017 9:39:00 AM
  31. Rated: 5
    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)

    Answer rated: 0
    i have succeeded to remove the adapter. thank you
    Answer by: alain thiry on Sep 1, 2016 12:47:00 PM
  32. Rated: 5
    10/6/2016 8:38 PM Baader 2" ClickLock eyepiece clamps
    What is the optical length for this product (Baader 2" ClickLock CL-SC-Clamp 2956220) ?

    Answer rated: -3
    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
  33. Rated: 5
    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: 0
    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
  34. Rated: 5
    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: -1
    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
  35. Rated: 5
    4/30/2017 11:39 PM Baader H-alpha Enforced-Narrowband 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: -4
    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
  36. Rated: 5
    12/4/2017 1:22 PM AstroSolar® ECO-size Safety Film 5.0, 140x155 mm
    I’m interested in the eco size safety film and it says “safe for visual solar observation (with additional optics). What does with additional optics mean? Is there another filter that should be used with this film?

    Answer rated: 4
    With additional optics means, with a telescope, a binocular or similar. UV/IR cut filter gives additional safety even if the film blocks these dangerous wavelength very good in combination with additonal optics like telescope or binocular.
    Answer by: Baader Web Team (Admin) on Dec 4, 2017 2:19:00 PM
  37. Rated: 4
    3/6/2017 9:10 AM Baader 36mm Hyperion Aspheric 2" Eyepiece
    Do you confirm the 72° apparent field of view with 31,75 mm connexion?

    Answer rated: -15
    The 72° apparent field of view can indeed only be confirmed for use with 2" barrel. With 1.25" barrel, the field of fiew is ~58mm. We apologize - we've just noted that this is wrongly stated in our technical data sheet. We will correct this.
    Answer by: Baader Web Team (Admin) on Mar 6, 2017 12:47:00 PM
  38. Rated: 4
    3/10/2017 3:29 PM Baader 21mm Hyperion 68° Modular Eyepiece
    Some users state that the actual field of view of the 21 mm is actually 60° rather than 68°.
    Can you confirm ?

    Answer rated: 3
    We have used this opportunity (your question) to take the eyepiece to the sky and verify the optical calculation by measuring it with the star drift method. We can absolutely confirm that the 21mm Hyperion eyepiece has an apparent field of view of 68° (+/- 2% measuring accurecy)
    Answer by: Baader Web Team (Admin) on Mar 17, 2017 12:05:00 PM
  39. Rated: 4
    3/12/2017 8:05 PM 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: -5
    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
  40. Rated: 4
    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: -13
    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
  41. Rated: 4
    4/1/2017 1:33 PM Baader Clearglass Filter (C) for focusing / dust protection
    What is the glass type used in this filter? The transmission curve resembles that of Schott KG-glasses.

    Answer rated: 0
    This is regular BK-7 substrate
    Answer by: Baader Web Team (Admin) on Apr 3, 2017 8:46:00 AM
  42. Rated: 4
    10/26/2017 9:26 AM Baader Double Polarizing Filter
    What is the technical and visual difference between "Baader Double Polarizing Filter" and "Baader Single Polarizing Filter"?

    Answer rated: 1
    A single polarized filter is only polarizing the light in one direction. It can be used to dim light which is already polarized, like in a Herschel Wedge. Double polarizing filters are two single polarized filters in a row. When you turn one of them, you see that the light gets dimmed stageless from very bright to very dark. Double polarizing filters are mainly interesting for visual Moon observation. For high end / high resolution photographic use we recommend grey filters (ND filters)
    Answer by: Baader Web Team (Admin) on Oct 26, 2017 10:15:00 AM
  43. Rated: 4
    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: -1
    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
  44. Rated: 4
    12/3/2017 6:02 AM Baader 2" ClickLock eyepiece clamps
    Which 2" Baader Clicklock will suit my Orion ED80 CF?

    Answer rated: 3
    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
  45. Rated: 3
    2/26/2017 3:55 PM Baader Filterbox, stackable on all sides
    What material are these boxes? Does the material become brittle, or easily broken in very low or freezing temperatures (e.g. -20 or -30 degrees C)?

    Answer rated: -3
    Sorry, these boxes are not meant to be subjected to temperatures of -20° or -30°C.
    The plastic material indeed will become brittle.
    Answer by: Baader Web Team (Admin) on Feb 27, 2017 8:42:00 AM
  46. Rated: 3
    10/14/2016 12:40 PM Baader Standard-Basis für Sucherhalterungen
    Will this be a good connection for my 10 x 60 Baader Vario-Finder with Astro-Physics Bracket to my Takahashi TSA 120 FT(Feather Touch Focuser).That is steady and fix.
    Regards Juha

    Answer rated: 1
    The Baader Standard base will fit only with one screw onto your tube (a sink-head screw is required - maximum thread diameter is M6). Also you would need our Finder holder MQR IV:
    Answer by: Baader Web Team (Admin) on Oct 25, 2016 10:59:00 AM
  47. Rated: 3
    10/28/2016 4:37 PM Diamond Steeldrive motor drive for Diamond Steeltrack focusers
    What is the part number for the diamond steeldrive motor drive Inc. the hand controller as it doesn't seem to be shown on your website.

    Answer rated: 13
    At the moment, on configurable products with dropdown options, the item number does not appear under the product name as on other single products. It appears however under the tab "Specifications" once an option has been choosen. In your case the item number you're looking for is # 2957153.
    We will try to make this more clear.
    Answer by: Baader Web Team (Admin) on Oct 31, 2016 8:36:00 AM
  48. Rated: 3
    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


    Answer rated: -5
    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
  49. Rated: 3
    10/24/2017 12:06 PM 2" BDS-NT Baader Diamond Steeltrack Focuser
    Is the Baader versabase available separately, if so what is the product code?

    Thank you

    Answer rated: 2
  50. Rated: 3
    12/12/2016 11:28 AM Telecentric System TZ-2 (2x focal length)
    I would like to know when the TZ3 will be available.

    Answer rated: 1
    The TZ-3 is now available. Please check out here:
    Answer by: Baader Web Team (Admin) on Feb 2, 2017 9:26:00 AM
    Answer rated: -13
    The TZ-3 Telecentric System will become available in February 2017
    Answer by: Baader Web Team (Admin) on Dec 12, 2016 11:56:00 AM
  51. Rated: 3
    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: 3
    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
  52. Rated: 3
    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: 5
    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
  53. Rated: 3
    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: -3
    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
  54. Rated: 3
    1/27/2017 4:47 PM Baader Neodymium (Moon & Skyglow) Filter
    Is there any chance of getting this filter in 36mm unmounted?

    Answer rated: -14
    we did regard our Neodymium Filters to be useful primarily for visual applications. Hence the demand for imaging filters has been very low through the years. At this time we do not plan to produce this filter in 36 or 31 mm diameter.

    However - any optician must be able to grind a 2" filter substrate down to 36 mm diameter. Just in case you were to have a very urgent requirement. Sorry - we cannot offer this service ourselves.
    Answer by: Baader Web Team (Admin) on Jan 30, 2017 8:44:00 AM
  55. Rated: 2
    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: -6
    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:
    Answer by: Baader Web Team (Admin) on Sep 15, 2016 8:22:00 AM
  56. Rated: 2
    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: -2
    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: -17
    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
  57. Rated: 2
    10/12/2016 10:43 PM Baader1¼" Amici-erecting-prism 45° with 24mm free aperture
    I am looking for a 45 degree 1-25" correct image diagonal. I want it to look at the view across the bay, and the image to be the same as looking through a pair of binoculars.
    Would your article part no.2956150 do the business. Is there any other options.

    Answer rated: 4
    Yes, this item will do the job!
    Answer by: Baader Web Team (Admin) on Oct 27, 2016 3:17:00 PM
  58. Rated: 2
    10/16/2016 8:30 AM 3D-printed Frame for D-ERF Filter (135 - 165mm)
    Will this mount on 120mm and 80mm refractor scopes?

    Answer rated: 1
    sorry - filter cells must be made to order for each telescope. ERF-filters are very heavy. It is not safe to put such heavy optical product into a simple cell with mounting screws.
    Answer by: Baader Web Team (Admin) on Oct 24, 2016 9:09:00 AM
  59. Rated: 2
    10/27/2016 10:58 AM 2" BDS-NT Baader Diamond Steeltrack Focuser
    I am interested in your Diamond Steeltrack NT Focuser for replacing the original Rack & Pinion focuser (which is lacking 1:10 fine-focus) on my Sky-Watcher Explorer-PX250 telescope (Aperture 254 mm, Focal length 1200 mm, Newton reflector).
    Have you a base plate for this focuser which is suited to this telescope tube? I have measured the distance for the bore holes lengtwise to the tube to be about 86 mm, and crosswise to about 81 mm. The latter distance is measured with a caliper, i.e. it is the straight distance between the holes, not the slightly longer distance measured along the circumference of the tube. The tube diameter is 285 mm.
    I hope there is a suitable base plate available for my telescope.

    Answer rated: 3
    The base plate you are asking for is already included in the BDS-NT standard outfit. The Baader Versabase fits all Tube size equal or larger than 200mm. It can be even attached to smaller tube-sizes with the included strip-shims. Please check out the video and the gifs on the product description. Also take note of the following downloads (more under tab "Downloads"):
    BDS Instruction manual:
    Versabase dimensions:
    Answer by: Baader Web Team (Admin) on Oct 27, 2016 10:59:00 AM
  60. Rated: 2
    10/19/2017 10:25 AM PlaneWave L-Serie Direct Drive Mount (varoius versions available)
    What is the delivery time for L - 500?

    Answer rated: 5
    We have received the first one today! This is going to be presented on the Space Tec in Bremen next week.
    The current delivery time, so fare I know is 2-3 month for a new order. But it depends on the current shedule from Planewave.
    If you have a demand for your project, please send us a E-Mail.
    Answer by: Baader Web Team (Admin) on Oct 19, 2017 1:25:00 PM
  61. Rated: 2
    5/21/2017 9:44 AM SolarSpectrum 0.7x Telecompressor 2"
    What is the ideal distance from the back of the 0.7x solar telecompressor lens to the face of the camera chip to give the 0.7x reducing factor? Thanks.

    Answer rated: -6
    The correct distance is 110 mm.
    Answer by: Baader Web Team (Admin) on May 22, 2017 2:44:00 PM
  62. Rated: 2
    11/15/2017 8:25 AM DADOS Slit – Spectrograph
    My spectra show dark stripes (see mark in picture) - where do they come from?

    Answer rated: -2
    The answer of this question can be found on our blog:
    Answer by: Baader Web Team (Admin) on Nov 15, 2017 8:29:00 AM
  63. Rated: 2
    7/7/2017 5:33 PM Baader Multipurpose Finder Bracket MQR III 7x50 (max 62mm)
    What is the minimum diameter tube that it will hold? And what is the minimum distance between the two rings? I want to know if it will securely hold my Starlight Xpress Lodestar camera which is 32mm diameter by 72mm long. Thanks :-)

    Answer rated: 4
    The minimum diameter is 38mm (and 48 for the MQR IV), but then the finderscope is only held in place, while you can't move it.
    Answer by: Baader Web Team (Admin) on Jul 10, 2017 1:35:00 PM
  64. Rated: 2
    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: -4
    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
  65. Rated: 2
    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: 0
    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
  66. Rated: 2
    2/8/2017 4:32 AM Baader SC / HD Ultra Short T-Adaptor, 7mm 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: -6
    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
  67. Rated: 2
    2/17/2017 3:16 AM Carl Zeiss 1¼" Abbe Barlow lens 2x
    What is the exact focal lenght of this barlow?

    Answer rated: 8
    The focal length of the Carl Zeiss Abbe Barlow is -65mm
    Answer by: Baader Web Team (Admin) on Feb 17, 2017 2:34:00 PM
  68. Rated: 1
    9/1/2016 11:51 PM Canon Camera Astro Upgrade
    What is the difference between ACF and BCF? Which one should I choose for Canon 80D

    Answer rated: 1
    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. Unfortunately we don't have a Filter that fits into the Canon 80D
    Answer by: Martin Rietze (Admin) on Sep 5, 2016 9:31:00 AM
  69. Rated: 1
    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: -5
    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
  70. Rated: 1
    3/10/2017 9:45 PM 6,5 mm Morpheus 76° widefield eyepiece
    Is the 1.25 inch adapter removable like the Hyperion Eyepieces?

    Answer rated: -2
    No, the 1.25 inch Adapter is not removable.
    Answer by: Baader Web Team (Admin) on Mar 13, 2017 8:28:00 AM
  71. Rated: 1
    3/10/2017 10:32 PM BCF 2 Astro Conversion Filter CANON EOS 5D/6D MK II
    Will the BCF 2 Astro Conversion Filter fit the original Canon 5D (classic) model? I ask because it appears the ACF-3 conversion filter is no longer available.

    Answer rated: 1
    good morning,
    I read that the filter is not compatible with the old 5d; Is the problem in thickness or size?
    Can not any filter be able to adapt it?
    thank you so much
    Answer by: Valerio Ghirardo on Jun 7, 2017 10:15:54 AM
    Answer rated: -1
    Unfortunately the former ACF-3 Filter is indeed not available anymore. The BCF-2 (nor any other Astro-Conversion filter we currently sell) will definitely not fit the old 5D model. Sorry that we cant be of service.
    Answer by: Baader Web Team (Admin) on Mar 13, 2017 2:42:00 PM
  72. Rated: 1
    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: 2
    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?"
    Answer by: Baader Web Team (Admin) on Oct 12, 2016 2:37:00 PM
  73. Rated: 1
    10/22/2017 5:47 PM Baader Multipurpose Finder Bracket MQR IV 9x60 finder (max diameter 72mm)
    Does the item fit a celestron C6?

    Answer rated: 3
    About the curvature at the bottom side of the standart base it allows to fit it on most OTA. Of course the C6 too.
    Answer by: Baader Web Team (Admin) on Oct 24, 2017 4:01:00 PM
  74. Rated: 1
    10/26/2017 11:05 PM Baader 2" ClickLock eyepiece clamps
    Love my SCT Baader click lock! Do you have one that’ll work for my Explore Scientific AR152 stock focuser?

    Answer rated: 2
    The connection thread from the tube is M68x0,75 which is very unusual and differs to the M68x1 which is actually kind of standart. We were talking about doing ClickLock for Explore Scientific telescopes. Hopefully we have a solution by the end of this year or Jan. ´18. Just visit our website then and when.
    Answer by: Baader Web Team (Admin) on Oct 27, 2017 8:30:00 AM
  75. Rated: 1
    12/28/2016 4:28 PM Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp
    I already purchased this beautiful prism. Now I would like to attach the Giant Bino Mark V. How can this be done directly? With a 2"-Quick Changer ? If not yet, will you make them soon?
    Or better: a Self Centering Adapter version ClickLock-QuickChanger. 2" and T2.

    Answer rated: -11
    Already the 2" housing might cause too much backfocus. A clicklock clamp between the housing and the bino would be much too long.

    You might order the T-2 Astro-System adapter #27 (2" to T-2):
    Remove the clicklock clamp by opening the 6 pc of headless set screws and thread the said adapter into the 2" thread inside the dovetail ring that did hold the clicklock in place. Then thread on the T-2 changer that came with the bino.

    This will be the absolutely shortest solution to attach the Bino onto any 2" Baader-Diagonal.
    Answer by: Baader Web Team (Admin) on Jan 4, 2017 3:12:00 PM
  76. Rated: 1
    11/10/2017 8:34 PM Baader V rail / dovetail bar 470mm for SC
    Dear Baader, I have a s\c Meade 10' LX200, can I use this bar for my OTA?

    Answer rated: -1
    The thread holes of the Meade OTAs are different to those from Celestron. I´m sorry but unfortunately this bar will not fit onto your telescope.
    Answer by: Baader Web Team (Admin) on Nov 13, 2017 9:07:00 AM
  77. Rated: 1
    7/3/2017 10:44 PM Baader H-alpha Enforced-Narrowband 3,5nm Filter
    I understand your 3.5nm Ha filter in 1.25" size will become available later this year. When will you produce 3.5nm filters of the same size in SII and OIII? Thank you.

    Answer rated: 7
    We are working on these filters, too, and hope to have them ready by the end of the year - but we can't promise it.
    Answer by: Baader Web Team (Admin) on Jul 5, 2017 12:34:00 PM
  78. Rated: 1
    11/30/2017 2:43 PM Baader H-alpha Enforced-Narrowband 3,5nm Filter
    Are you developing a 36mm unmounted version of this filter?

    Answer rated: 0
    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
  79. Rated: 1
    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: -1
    Please see following link:
    Please mention the reference surface which is the determining factor.
    Answer by: Baader Web Team (Admin) on Dec 4, 2017 8:01:00 AM
  80. Rated: 1
    7/12/2017 4:56 PM Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp
    Is the prism in this diagonal (#2456117) a Carl Zeiss spec prism?

    Answer rated: 5
    Yes, this prism is produced according to the Carl Zeiss specifications
    Answer by: Baader Web Team (Admin) on Jul 13, 2017 1:58:00 PM
  81. Rated: 1
    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: 7
    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
  82. Rated: 1
    1/7/2018 12:49 AM Mark V Großfeld (Giant)-Binocular
    What is the total light transmission of this binoviewer?

    Answer rated: 1
    Please excuse, there is no answer to this question. What do you mean by "total light transmission"? The incoming light is split into two channels - evidently the light in both channels appears to be notably dimmer when you close one eye at a time and try to judge the brightness in each channel separately. What does not come into play during such kind of "fake-evaluation" is "the power of the human brain".
    It happens "in the brain" that both light trains become reunified. And what actually happens there is that the image all of a sudden does NOT look dimmer but that fine detail and most subtle color differences within planetary surfaces become recognizable much easier and that observation happens effortlessly without fatigue - even when observing over a long time. Regardless of light throughput - the real virtue of a binocular viewer does lie in the optical quality of the glass and utmost care in optical surface polish, in perfect angle orthogonality of each prism, an immaculate beam splitter quality, highest degree of optical adjustment of all optical elements at any interpupillary distance - and only lastly: utmost coating quality. These are the most necessary criteria (in this order) for supporting an undeteriorated viewing experience with both eyes - even at highest magnification work. So - whatever anyone else is claiming - the Mark V has the best light throughput and the highest quality prism surfaces and adjustment - and and and - of any commercial astro-binocular viewer in the market.
    Answer by: Baader Web Team (Admin) on Jan 11, 2018 8:27:00 AM
  83. Rated: 1
    8/5/2017 10:32 AM Baader 3", 60mm rider clamp
    Which Dovetail model is compatible with this rider clamp?

    Answer rated: 6
    You can use it to attach accessories to all standard 3" dovetails (Losmandy-style), e.g. these ones:
    Answer by: Baader Web Team (Admin) on Aug 7, 2017 8:51:00 AM
  84. Rated: 1
    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: 8
    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
  85. Rated: 0
    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: 5
    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
  86. Rated: 0
    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: 1
    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 ( )
    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
  87. Rated: 0
    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: -6
    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
    Answer by: Tobias Baader (Admin) on Sep 26, 2017 4:46:00 PM
  88. Rated: 0
    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: -2
    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
  89. Rated: 0
    10/7/2017 4:03 AM RCC I, Rowe Coma Corrector
    I wish to buy a coma corrector and I want to know if I can use the RCC I on my new Télescope Explore Scientific N 208/812 PN208 Hexafoc OTA with 60 mm back focus?
    Best regards

    Answer rated: 5
    We could not test this specific telescope, but if necessary, you can remove the M48-stopring to insert it deeper into the focuser, if necessary.
    Answer by: Baader Web Team (Admin) on Oct 9, 2017 11:22:00 AM
  90. Rated: 0
    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?


    Answer rated: -3
    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
  91. Rated: 0
    5/9/2017 8:39 AM V-Dove Tail Celestron-orange anodized, 345mm, drilled for Celestron 8“ SC / HD
    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
  92. Rated: 0
    10/15/2017 4:37 AM Baader T-Ring Pentax K to T-2
    I want to install a Ha filter (have not bought yet) as close as possible to the camera body of my Pentax K-1, similar to what the Baader Canon T-ring can do with the filter chamber built into the T-ring. Can this T-ring for the Pentax be able to have a filter installed like in the Canon T-ring with a filter chamber? If not, how can I get a filter as close as possible to the t-ring or camera body?

    Answer rated: 0
    Unfortunately this T-Ring is not designed to hold a filter. But you can connect the T-Ring with a 2" nosepiese wich has a 48mm filter thread
    Answer by: Baader Web Team (Admin) on Oct 19, 2017 2:25:00 PM
  93. Rated: 0
    10/21/2017 3:49 PM M68 to 2" UNFi Conversion Ring
    Is there a 2 inch nose that will screw into this M68 conversions ring without using additional items?

    Answer rated: 0
    Yes, you can attach this item
    Answer by: Baader Web Team (Admin) on Oct 24, 2017 11:14:00 AM
  94. Rated: 0
    10/22/2017 5:31 PM Baader T-Ring Sony E/NEX Bayonet with D52/M48 to T-2
    Can this adapter house a 50.4 filter (like the canon protective t-ring)

    Answer rated: 0
    This is not a protective T-Ring. So unfortunately it cannot hold a filter. You need to combine this T-Ring with one
    for example with one of our 2"-T2 Adaptors wich have a filter thread :
    Answer by: Baader Web Team (Admin) on Oct 23, 2017 5:00:00 PM
  95. Rated: 0
    11/9/2017 2:22 PM Baader H-alpha 35nm CCD Filter
    Does the filter block IR radiation right down to 2400nm. Solar radiation extends that far. KG3 heat absorbing glasses protect down to 2400nm. On your UV IR blocking filter you say it is better than KG3 so that implies that goes down to 2400nm.

    Answer rated: 14
    Our H-alpha filters are developed with the usage of CCD imaging in mind. The most used camera chips are sensitive to light with a wavelength up to 1150 nm. Therefore blocking the light on such stretched region, would have resulted in an unnecessary cost increase.
    We do not use KG- glass because it does not allow 100% transmitance on the visible spectrum. In this respect, our filters acheive a better result than KG glass.
    Answer by: Baader Web Team (Admin) on Nov 10, 2017 8:32:00 AM
  96. Rated: 0
    11/20/2017 3:10 PM Morpheus 76° eyepiece set (complete)
    I am looking to attach my Nikon D810A dslr to a Morpheus eyepiece, however I am having difficulty understanding which extension tube I would need (along with the M43 / T-2 Adapter).

    Hopefully this will mean I will not require a big shift in focus every time I attach my dslr.

    Many thanks

    Answer rated: -2
    It is easy: For a full-frame-camera, you need ca. 40mm of additional distance, otherwise there will be distortions at the edges.
    For a smaller APS-C-camera, ca. 30mm are sufficient (e.g. two 15mm-extensions, or a quick-changer and a 15mm-extension)
    For a Micro-Four-Thirds-camera, you need even less distance to get a good image.
    We have described several adaptations in the PDF at
    Answer by: Baader Web Team (Admin) on Nov 20, 2017 3:47:00 PM
  97. Rated: 0
    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: -2
    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
  98. Rated: 0
    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: 2
    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
  99. Rated: 0
    11/30/2017 1:56 PM Baader 36mm Hyperion Aspheric 2" Eyepiece
    I can't get a focus @ infinity (planet, stars ....) with this specific eyepiece. I use this 36mm eye piece on an Celestron Spotting Scope Regal M2 100ED 1.25" tube. Is there a work around?

    Answer rated: 0
    Unfortunately, there is no chance with the Hyperion 36mm and a spotting scope - the 1,25"-adapter is rather long to avoid too much obstruction, but this also means that you can't reach focus with a refractor spotting scope. You need a 1,25"-eyepiece with a matching position of the field stop like the 32mm Classic Plössl (this focal length also gives you the largest possible field of view with a 1,25" eyepiece holder).
    Answer by: Baader Web Team (Admin) on Nov 30, 2017 2:37:00 PM
  100. Rated: 0
    12/4/2017 11:23 AM Baader UFC T-2 (m) Camera-Adapter (optical height: 2 mm)
    I have a c14 and wanna use Mark V binoviewer. If I use NexStar Locking Ring 2" and UFC S70/2" Telescope adapter, UFC Base, and UFC T2 camera adapter, T2 stardiagonal prism and Mark V, Is it good to use vinoviewing??
    and if use above system, diagonal can rotate??
    from korea..

    Answer rated: -2
    This should work as long as you use high quality 2" filters. The problem is that many filters are designed to be used close to eyepiece - the farther away they are from the eyepiece, the more disturbing will be all imperfections of the filter, like a non-even surface. With high-end filters, it should work even with the addidtional 11 cm light-path of a binoviewer.

    To rotate the star-diagonal, you need an additional T-2 quick-changer in front of the star diagonal. Then, you can rotate the diagonal and the binoviewer; the filter holder will stay fixed. Otherwise, you'd have to unlock/lock the Neckstar Locking Ring each time when you want to rotate the whole setup.
    Answer by: Baader Web Team (Admin) on Dec 4, 2017 11:30:00 AM
  101. Rated: 0
    7/11/2017 11:29 AM Baader Multipurpose Finder Bracket MQR III 7x50 (max 62mm)
    1. Do you ship to Australia?
    2. Is this bracket similar to the discontinued excellent Celestron 51149A bracket?

    Answer rated: 0
    Distribution for Australia is handled be - they are closer to you and can handle requests faster than we can.

    The MQR do the same as the Celestron bracket, but are of a different, more sturdy design.
    Answer by: Baader Web Team (Admin) on Jul 12, 2017 8:21:00 AM
  102. Rated: 0
    12/11/2017 2:23 AM Baader UHC-S / L-Booster-Filter
    Is this filter parfocal with the high speed narrowband set?

    Answer rated: 3
    Yes. The Baader UHC-S / L-Booster is parfocal with the high speed narrowband set.
    Answer by: Baader Web Team (Admin) on Dec 11, 2017 11:05:00 AM
  103. Rated: 0
    12/11/2017 2:58 PM Baader H-alpha 7nm CCD Narrowband-Filter
    Can a H-alpha 7nm CCD Narrowband-Filter be used for viewing in conjunction with the Baader Solar Filter?

    Answer rated: 0
    WARNING - using this filter on the sun visually will permanently damage your eye! The CCD narrowband Halpha filters are way to broad for making prominences or solar surface detail in Halpha visible and image will be much too bright for visual use. Halpha filters for solar observations like "SolarSpectrum" filters have 0,7nm. If you combine the CCD narrowband filter with our Astrosolar film you see nothing. Image will be completely black.
    Answer by: Baader Web Team (Admin) on Dec 11, 2017 3:26:00 PM
  104. Rated: 0
    1/3/2018 12:57 PM Baader Tripod Adapter Flange for NexStar SE / EVO
    Hello, 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
  105. Rated: 0
    8/3/2017 11:57 AM Baader Sky Surfer V illuminated finder
    Vos to change thé batterie ?

    Answer rated: 5
    Le batterie est dans le bouton de régler de la clarté
    Answer by: Baader Web Team (Admin) on Aug 3, 2017 12:40:00 PM
  106. Rated: 0
    1/19/2018 10:58 PM Baader UFC 2" FLI Camera-Adapter (optical height: 10 mm)
    Is this the correct adapter to use to attach the FLI ML 16200 camera with a 65mm shutter to the UFC base?

    Answer rated: 0
    Yes indeed. This is the right adapter that allows the usage of the UFC base with the FLI-ML and PL model cameras.
    Answer by: Baader Web Team (Admin) on Jan 23, 2018 9:10:00 AM
  107. Rated: 0
    2/17/2017 2:26 AM DADOS: Baader Calibration lamp
    How many amps does the calibration source require. Do I have to get a 110ac to 220ac step up transformer?

    Answer rated: 14
    This glow lamp uses less then 4W, drawing approx. 10mA current. So yes, unfortunately you will need a step up transformer
    Answer by: Baader Web Team (Admin) on Feb 20, 2017 9:10:00 AM
  108. Rated: -1
    3/9/2017 12:52 PM Baader CCD Complete Filterset II (L-RGB-C / H-alpha 7nm / OIII 8.5nm / SII 8nm)
    I just bought 36mm complete filterset in Delta Optical. Baader Filters are marked V on the edge. Which side should be installed filters in a filter wheel?

    Answer rated: 1
    We received this question a while ago and answered it in detail. Please look at the Tab "FAQ" on this product page. To answer you in short, this arrow indicates which face of the filter should be directed towards the sky (telescope-sided).
    Answer by: Baader Web Team (Admin) on Mar 9, 2017 1:58:00 PM
  109. Rated: -1
    8/23/2017 12:16 AM Filter cell 2" classic (8mm height)
    I want to add an IR cut filter to an ASI071 CMOS camera. The camera comes with an M48 to M42 adapter so I should be able to screw this filter into the adapter and screw the adapter into the camera. Does the "front side" of this filter have M48 female threads? If so, what is the depth of the thread?

    Answer rated: -4
    We propose to choose the low profile cell - it has 6 mm height above the male M48 thread and it may later fit into all commercial filter wheels - whereas the cell with 8 mm height may stuck the rotation.

    The inner clear diameter of the LPFC filter cell is 47.4 mm. A filter bottoms out against a clear opening of 46 mm diameter.

    The cell has an M48 internal thread of 5.5 mm in height and a retainer ring with an M48 make thread, the mechanical height of that retainer ring is 1,6 mm.

    In essence this creates room in the chamber for our 2 mm thick, round filter discs of 47.4 mm diameter and it leaves room enough to thread the next filter cell into the first one - so that filters can be combined.
    Answer by: Baader Web Team (Admin) on Aug 30, 2017 2:17:00 PM
  110. Rated: -1
    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: -2
    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
  111. Rated: -1
    10/2/2017 10:06 PM Baader AllSky Domes (2.3 - 6.5 Meter)
    Do you have drawings showing the interior clear dimensions for this all-sky dome and also the next size larger? I am in particular interested in whether there is room inside for a CDK500 telescope mounted on the agile new L-500 mount.

    Answer rated: 1
    We are currently awaiting the new L-Mount, the first is coming soon.
    The CDK 500 has a moving radius of 43,66" = appr. R1110mm. The "free sphere" in our 3.5m AllSky Dome is R1400. So the CDK 500 will fit inside a 3.5m AllSky and for sure in a 4.5m.
    However, unfortunately not in a 2.3m AllSky Dome.
    Answer by: Baader Web Team (Admin) on Oct 3, 2017 2:53:00 PM
  112. Rated: -1
    10/5/2017 4:16 PM Baader 3" rider clamp / 60mm long
    what is the width of the rail that this clamp is designed for? I have a 76mm wide rail (the widest part of the dovetail) and I am looking for the right clamps.

    Answer rated: -1
    The width of this clamp is 76mm (3 inch). So it fits onto your dovetail.
    Answer by: Baader Web Team (Admin) on Oct 5, 2017 5:00:00 PM
  113. Rated: -1
    5/16/2017 9:24 PM SolarSpectrum Research Grade 0.4x Telecompressor 2"
    What is the distance from the ccd camera chip to the 0.4x reducer back lens surface to achieve 0.4x compress ratio.

    Answer rated: -8
    The distance is 74 mm
    Answer by: Baader Web Team (Admin) on May 17, 2017 8:26:00 AM
  114. Rated: -1
    6/19/2017 2:51 AM 1 kg leveling counterweight and V-dovetail clamp, Diam. 70mm
    Hi guys, does it fit in a SCT Celestron AVX 8" EdgeHD dovetail ?
    Thanks a lot !!

    Answer rated: 0
    Yes, it fits to all dovetails which are compatible with the Vixen-style - this includes the dovetails used with the AVX-mount.
    Answer by: Baader Web Team (Admin) on Jun 19, 2017 8:52:00 AM
  115. Rated: -1
    6/21/2017 12:33 PM Baader DT-Adapter III M68a / SP54a
    Does this item have any optical length?

    Answer rated: -1
    The adapter has got an optical length of 6mm.
    Answer by: Baader Web Team (Admin) on Jun 21, 2017 12:50:00 PM
  116. Rated: -1
    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?


    Answer rated: 5
    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:
    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
  117. Rated: -1
    12/7/2017 11:51 AM 2" MPCC V-1 Mark III Newton Coma Correktor - SET: Visual and Photographic Version
    I'm a newbie in astrophotography. If I'd buy 2" MPCC V-1 Mark III Newton Coma Correktor - SET for f4 Newton, would I still need an additional T-ring in order to attach my Canon DSLR camera into the OTA?

    Answer rated: 4
    Yes, you will need an T.Ring für your Canon Camera, there are different ones available:
    1. The "normal" T-Ring:
    2. The "protective" T-Ring were you can insert a filter wich saves the sensor from dust:
    3.The ultrashort version if you do not have enough backfocus for the other ones:
    Answer by: Baader Web Team (Admin) on Dec 7, 2017 12:21:00 PM
  118. Rated: -1
    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: -5
    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
  119. Rated: -1
    2/2/2017 9:35 AM Canon Camera Astro Upgrade
    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
  120. Rated: -2
    3/27/2017 3:18 PM Optical Wonder™ Set (Cleaning Fluid and Cloth)
    Is this sutible for expensive camera lenses etc? Thanks

    Answer rated: -5
    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":
    Answer by: Baader Web Team (Admin) on Mar 27, 2017 3:42:00 PM
  121. Rated: -2
    10/14/2016 11:03 AM Baader 2" ClickLock eyepiece clamps
    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: -1
    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
  122. Rated: -2
    9/12/2017 3:13 PM Baader T-Ring Canon EF (EOS) to T-2
    If I remove T2 ring from the Canon DSLR bayonette does it reveal m48x0.75 threads?

    Answer rated: -1
    No, there is a dovetail inside, so that the camera can be rotated into the desired position, if the adapter is fix at the telescope. For an M48-thread, you need the Protective DSLR T-Ring.
    Answer by: Baader Web Team (Admin) on Sep 13, 2017 8:16:00 AM
  123. Rated: -2
    12/11/2016 2:22 PM Baader 2" ClickLock eyepiece clamps
    Have a Takahashi TSA 120 with a Starlight Instruments FTF3035B-A
    Feather Touch Focuser. Think the tread into the focuser is M75X 1 Female Tread. Do you have a 2" ClicLock-clamp for that?
    Regards Juha
  124. Rated: -2
    6/7/2017 8:51 PM Alan Gee Telecompressor Mark II (T-2 part #20)
    I see 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: 0
    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
  125. Rated: -2
    12/30/2016 10:14 AM Baader 36mm Hyperion Aspheric 2" Eyepiece
    Is this eyepiece compatible with a F=1000mm, D=200mm telescope?
    Thanks in advance for the answer

    Answer rated: 2
    Yes it is. Sharpness at random is slightly worse compared to an f/6 telescope but still good compared to many other eyepieces in this category.
    Answer by: Tobias Baader (Admin) on Jan 20, 2017 8:41:00 AM
  126. Rated: -2
    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: -6
    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
  127. Rated: -2
    1/17/2017 3:40 AM Baader Metal V-bracket for SkySurfer 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: 5
    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
  128. Rated: -2
    7/1/2017 12:42 AM Baader Neutral Density Filter (ND 1.8, T=1.5%)
    Is the Baader ND 3.0 the correct filter to use with a 120mm refractor and herschel wedge to control intensity for visual use and for ccd photographing sun with the scope and wedge?
    Is an additional infra red cut filter needed for visual and ccd use?

    Answer rated: 2
    The ND3-filter is included with the Herschel Wedge and must always be used for visual observations; it may only be removed if you are using a camera for projection and very high magnification/ long f-ratios. Only then can it be replaced with the ND1.8, if the image is too dark.

    For visual use, you must always use an additional filter behind the Herschel wedge and the ND3 - this may be the Solar Continuum (which is included with the Herschel), another ND-filter or the single 2" polarizing filter #2408342. This filter can be mounted either inside of the 2" eyepiece or in the 2"/1,25"-reducer; if you rotate it, you can change the brightness according to your needs by rotating the eyepiece/adapter.

    An additional IR-cut-filter is not necessary for visual use if you use the filters included with our Herschel wedge; it *may* be helpful to achieve sharper images with a CCD if the camera does not have an integrated IR-filter - but then you will usually need the filter for deep-sky-photography, too.
    Answer by: Baader Web Team (Admin) on Jul 3, 2017 11:22:00 AM
  129. Rated: -2
    7/20/2017 3:01 PM Baader V-Dove Tail Clamp, Diam. 70mm, with one clamp screw
    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: -2
    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
  130. Rated: -2
    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: -7
    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
  131. Rated: -2
    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: 7
    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
  132. Rated: -2
    2/18/2017 6:53 AM Baader 3" Dovetail Plate (Losmandy)
    What is the spacing of the mounting holes? (Astrophysics rings, which i am trying to find a bar for, require 60mm or 3.2 inch spacing)

    Answer rated: 5
    The spacings are 60mm and 88,9mm - thus perfectly suitable for Astro Physics rings.
    Answer by: Baader Web Team (Admin) on Feb 20, 2017 1:53:00 PM
  133. Rated: -3
    3/3/2017 10:55 AM RCC Off Axis Guider
    Does this OAG have any focus ability? If not how does one ensure that both cameras are focused?

    Answer rated: 8
    The OAG itself has only little focus ability: the prism can be moved up and down the range of ~3mm.
    But with additional parts you have more flexibility: The OAG has a 1 1/4" eyepiece holder with three screws. We do produce a 1 1/4" stopp ring to fit onto the eyepiece barrel - so that the eyepiece can be raised in the holder and locked tight.
    If the eyepiece needs to be lifted upward even more, we produce 1 1/4" extension tubes, to make the eyepiece barrel become longer. The extension tube threads into the eyepiece filter thread.

    1.25" barrel:
    1.25" extension:
    Answer by: Baader Web Team (Admin) on Mar 6, 2017 9:11:00 AM
  134. Rated: -3
    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

    Answer rated: -6
    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:
    You can find T-2 extension tubes (with variable and fixed length) at
    Answer by: Baader Web Team (Admin) on Aug 30, 2017 9:01:00 AM
  135. Rated: -3
    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: 8
    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: 5
    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
  136. Rated: -3
    11/12/2016 5:47 PM Baader H-beta 8.5nm CCD Narrowband-Filter
    Will the 1.1/4" H-Beta mounted filter fit on my QSI-583 WSG filter wheel? I use AstroDon filters that appear to be specially fit.

    Answer rated: -1
    We do not have the QSI-583 WSG filter wheel and do not know its measurements.

    The housing of the 1,25-inch filter has got an outer diameter of 31mm and is 6mm high (8mm high, if you include the thread). It is this filter cell:
    Answer by: Baader Web Team (Admin) on Nov 14, 2016 9:48:00 AM
  137. Rated: -3
    5/12/2017 7:43 PM 2" BDS-RT Baader Diamond Steeltrack Focuser
    Is there an adapter which will allow me to attach the Diamond Steeltrack to a venerable Vixen 90 Fluorite? The scope I love but the focuser was always poor and now terrible!

    Answer rated: -1
    Thanks for your interest in our Diamond Steeltrack. We cant answer the question for certain, since we do not have the Vixen 90 Fluorite in stock and don't know the inner/outer thread diameters. Please let us know the thread size and pitch where your current focuser is attached.
    Answer by: Baader Web Team (Admin) on May 15, 2017 9:34:00 AM
  138. Rated: -3
    10/30/2017 4:35 AM Baader L-RGB CCD-Filterset
    What type of glass is used in Baader Filters?
    BK7 or float plate?

    Answer rated: -3
    For our filters we use optical glass and not float glass.
    Different spectral transmissions require different subrates. BK 7, in many cases, is not the most suitable material.
    Answer by: Baader Web Team (Admin) on Nov 2, 2017 12:38:00 PM
  139. Rated: -3
    6/6/2017 2:41 PM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    Will the new Mark IV work with a Pentax 65mm spotter and if so are any additional adapters required?

    Answer rated: 6
    We could not test it with every spotting scope on the market, but if you use the included spotting scope ring and the included 1,25" barrel, there should be no problem - the Pentax is designed for the 1.25"-standard, and the Hyperion Zoom works with all similar spotting scopes which we have tested. If the Pentax 65 works with any 1,25" eyepiece, then the Hyperion should work fine, too.
    Answer by: Baader Web Team (Admin) on Jun 12, 2017 11:11:00 AM
    Answer rated: 2
    I have the Pentax 65mm spotter scope and this zoom does not reach infinity focus at all zoom ranges. Needs a bit more in focus than my other eyepieces which do come to focus in the same scope. The Pentax uses standard 1 1/4" eyepieces. It s just barely missing focus...maybe another 1/8" would work over all the zoom range. Too bad as other than that this is a great eyepiece with all my astronomy telescopes.
    Answer by: Robert Berta on Oct 6, 2017 10:44:11 PM
  140. Rated: -3
    11/12/2017 12:38 PM Baader 2" ClickLock eyepiece clamps
    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: -3
    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
  141. Rated: -3
    11/18/2017 9:59 PM Baader 17mm Hyperion 68° Modular Eyepiece
    Is this compatible with the celestron Ultima 80?
    Many thanks

    Answer rated: -4
    Unfortunately no - only the Hyperion Zoom eyepiece is compatible with the Celestron Ultima spotting scopes. The Hyperion eyepieces with fixed focal length do not have the thread which is required by the Celestron Ultimas.
    Answer by: Baader Web Team (Admin) on Nov 20, 2017 11:25:00 AM
  142. Rated: -3
    12/4/2017 5:46 PM Baader Handle for Telescopes with two pc 3" rail clamp
    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: 2
    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
  143. Rated: -3
    1/25/2017 11:13 PM Baader T-2 Stardiagonal (Zeiss) Prism with BBHS ® coating (T-2 part #01B)
    I would like to know if the Baader Planetarium Prism T2 Diagonal 32mm MaxBright (#2456005) and also the Baader Planetarium StarDiagonal Prism T2/90 ( #2456095 ) have the BBHS silver coating on the prism ? I have ask about this here in the states but no one seems to know the answer.

    Answer rated: 7
    The 32mm star diagonal (#2456005) is produced in the regular way - just like prisms are being made since four hundred years - without ANY coating applied onto the hypothenuse (reflecting) face. Please also check our website, nowhere do we state that this star diagonal would feature our BBHS-coating.

    Any beam of light that will hit that uncoated surface under exactly 45° of incoming angle will undergo a "total reflection" (as soon as there would be a regular antireflection coating applied onto that reflective face, the performance would suffer greately). For ages Carl Zeiss had preferred the total reflection of prisms versus the reflective surfaces of mirrors, because until recently mirrors did tend to age (produce haze) very quickly.

    For the BBHS T-2 prisms we needed perfect reflection also for very short focus telescopes and we wanted to produce a prism that could be used for a wide range of purposes - also for other reflective angles than exactly 45°. In this sense the BBHS-coating applied onto the T-2 prisms offers "another league" of functionality - and the hard silver coating will keep this optical surface to stay clean for ages, whereas the open glass surface of the 32 mm prism will be prone to collect some dust or even dew over time.

    Still the 32mm prism is mounted within a precision metal housing, suitable to carry the weight of the Maxbright and heavier binocular viewers asf. It offers the very shortest light path for attaching - say - a Maxbright Bino onto any telescope due to its T-threads. In this way we regard it as a very good solution for any low-cost binocular viewer, since the optical polish of the prism faces is made very precise, with the extended optical distance in mind that adds itself into the light path when putting the added mechanical length of a binoviewer between the 90° prism and the eyepiece focal plane. Regular 90° prisms often feature a plastic housing and are only made to supply sufficient optical quality for an eyepiece to be mounted directly atop such a prism face.

    Conclusion: each of these two prisms (32mm as well as BBHS T-2) are top performers within their respective price range. And if you plan to ever use a Mark V Binoviewer, the T-2 BBHS prism will be the first and most useful investment for an undeteriorated viewing experience.

    Read also more on Baader BBHS Reflective Properties:
    Answer by: Baader Web Team (Admin) on Jan 26, 2017 11:01:00 AM
  144. Rated: -3
    12/8/2017 8:56 PM Baader zero-tolerance protective Canon DSLR T-Ring T-2/M48 and 2"
    I need an adapter that will allow me to attach my Nikon 610 to my Celestron 8se that will take a 2" light pollution filter for prime focus astrophotography. I currently have a T-Ring and T-Adapter provided by Celestron, but it will not take 2" filters

    Answer rated: -3
    We have the protective ring only for Canon cameras. According your question there is only the classic way using this nose piece:
    To connect 2" accessories onto the OTA we have two different rings:
    If you choose the ClickLock clamp please take Item No. #2956220 with SC-thread
    Answer by: Baader Web Team (Admin) on Dec 11, 2017 9:25:00 AM
  145. Rated: -3
    12/19/2017 5:04 AM Baader SC / HD Ultra Short T-Adaptor, 7mm 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: -2
    The Malincam comes with a C-Mount thread so you´ll need this two adapters because the EP has M43 thread:
    A lot more possibilities for adaptions you can see here (especially the last page for the video modules):

    Answer by: Baader Web Team (Admin) on Dec 19, 2017 10:18:00 AM
  146. Rated: -4
    3/19/2017 11:14 PM Baader H-alpha 35nm CCD Filter
    What is the thickness of the 1.25" H-alpha filter cell including the depth of the thread? Thank you.

    Answer rated: 0
    The height of the cell that contains the filter glass is 6 mm. The filter thickness is 2 mm - with a retaining ring thickness of 1 mm.

    Please calculate that there are roughly 2.5 mm of thread space remaining in the cell. However - we do not recommend to mount two filters straight into the same cell. This might cause very strong retro reflections.
    Answer by: Baader Web Team (Admin) on Mar 20, 2017 8:39:00 AM
  147. Rated: -4
    9/3/2017 3:25 PM 2" BDS-SC Baader Diamond Steeltrack Focuser
    I would like to know 1) if and how I can fit this focuser to my Skywatcher MAK127 (bought ~2 years ago) ; do I need some kind of adapter ? will the original focusing knob at the visual back of the MAK still be accessible ?
    2) same question for Skywatcher MAK180
    Thanks a lot !

    Answer rated: 6
    We do not have the technical data of all telescopes, so you should have to check the manual of your telescope or contact the manufacturer to be sure. However, the BDS-SC comes with adapters to 2" UNC (SC-thread) and 3,3".

    The Sky-Watcher 180 *should* be equipped with a standard SC-thread (2), so you should be able to attach the BDS-SC without any problems - if the description I have found onlie (still) applies to your specific model; technical data can change over the years.

    The Mak127 seems to have only a T-2-thread (and a clear aperture of 1,25"), so a 2"-focuser may be a bit over-sized. But you should be able to attach the focuser with the Baader Expansion Ring 2"a/T-2i with 1mm optical path length (T-2 part #28) #2958242. Please check the manual und Downloads for the dimensions the the steeltrack, to see if you get problems with the focussing knob of your telescope.

    You can still use the main mirror focuser of your telescope when the SteelTrack is installed.
    Answer by: Baader Web Team (Admin) on Sep 4, 2017 9:23:00 AM
  148. Rated: -4
    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: 7
    Please see following PDF Document about the 0,7x Celestron Reducer:
    As you can see there is only 105mm back focus left. the BDS SC is at least 93mm long.
    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
  149. Rated: -4
    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: 6
    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
  150. Rated: -4
    4/17/2017 8:38 AM Baader PAN-EQ-Clamp V190 (EQ Standard)
    Can I use this on Takahashi EM-200 for 4" (D Series) dovetail?

    Answer rated: -5
    No, unfortunately this will not fit. The Pan EQ Clamp fits only up to 3"
    Answer by: Baader Web Team (Admin) on Apr 18, 2017 9:36:00 AM
  151. Rated: -4
    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: 0
    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
  152. Rated: -4
    5/12/2017 5:47 AM Baader U-Venus-Filter (350nm)
    I am looking for Baader Planetarium Ultraviolet Venus filter. I s this the same as U-Venes Filter? I will be using it for UV reflective photography. I'm using a Nikon D70 camera with a 55 mm Nikor lens to be attached to the nikon base. Which attachment do I have to buy? I have step up and step down converters. Would those work? I use 52mm filters (IR pass as well as UV-IR block) with the same lens.
    Please let me know ASAP. Also how much would delivery cost and the amount of time taken to send to Melbourne Australia?

    Thank you

    Answer rated: 7
    Yes, the U-Filter is the Ultraviolet-Filter, which only transmits UV radiation.
    To adapt any 2"-filter with housing to your camera, you need
    Baader DSLR-2" Filter Holder M48/SP54 # 2408166 (converts the astronomical 2"/M48-filter-thread to a standard 54mm-camera-thread)
    Baader Hyperion DT-Ring SP54/M55 for DTAdapter II&III and Hyperion Eyepieces
    # 2958055 (this is the step-up-ring to your 55mm-camera-thread)

    For shipping to Australia, please contact, our Australian distibutor. Our local distributors have spend a lot of time to present our products in your language, and can give you faster delivery times and service in your country than we can from Germany.
    Answer by: Baader Web Team (Admin) on May 15, 2017 11:56:00 AM
  153. Rated: -4
    11/23/2016 11:29 AM Baader Multi-Purpose Vario Finder 10x60 (single or with MQR-IV finder holder)
    What is the best way for focusing the VarioFinder?

    Answer rated: -4
    There are three ways to do it. The easiest way is of course the thumb screw which presses onto a brass ring. Usually that's the only screw you'll need. If you loosen it, you can move the tube with prism and eyepiece or camera.

    There are also four headless set screws around the back end, which apply force to the brass ring. They are used to minimize play (flop) in the sliding function. If necessary, set them so that the sideways movement is minimized - but so that the tube can still be pulled back and forth with an almost barely acceptable amount of friction.

    If you don't reach focus, you can also move the front lens back and forth by 12 mm when opening the knurled locking ring that holds the lens in place. So even if all the back end is locked tight, still camera-focus can be corrected by rotating the objective lens-cell forward or backward after having loosened the locking ring. For loosening, the locking ring must be rotated clockwise when you look down onto the objective.

    This may seem a little bit crude, but we wanted a stiff and sturdy solution - so that even a heavy guiding camera cannot cause flexure in the system. Other focusers for such small optics are either made of plastic or wobble anyway. They are good enough for visual use, but nor for guiding.
    Answer by: Baader Web Team (Admin) on Nov 24, 2016 2:32:00 PM
  154. Rated: -4
    1/8/2017 12:57 AM Baader Hyperion Zoom Mark III, 8-24mm eyepiece (1¼" / 2")
    When do you expect to be able to sell again this zoom eyepiece?

    Answer rated: -1
    The Baader Hyperion Zoom Mark III is discontinued. It will be replaced by its successor Baader Hyperion Universal Zoom Mark IV.
    We will publish information on the new Zoom version in mid January. It will be available for sale on our website and at our dealers around end of January.
    Answer by: Baader Web Team (Admin) on Jan 9, 2017 10:21:00 AM
  155. Rated: -4
    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: 11
    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
  156. Rated: -4
    7/21/2017 3:46 PM ASBF: AstroSolar Binocular Filter OD 5.0 (50mm - 100mm)
    Hi. I want to shoot the solar esclipse and I need a filter. There are just a couple of things I want to make sure of before I purchase this. Is this filter good for capturing an image or only for observation? Also, my camera lens is 58mm, so would this filter fit my lens properly? Thanks.

    Answer rated: -2
    You can surely use it visually and for imaging as well. Please check out the first FAQ on our Website: "I want to take images of the sun. Do I need AstroSolar® 5.0 or 3.8 Film?"
    The clamping range of the ASBF 50 is 55 - 70 mm. So it should fit fine on your camera lens.
    Answer by: Baader Web Team (Admin) on Jul 21, 2017 4:40:00 PM
  157. Rated: -4
    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: -2
    This is described on page 5 and 7 of the manual (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
  158. Rated: -5
    3/28/2017 3:24 PM Baader V rail / dovetail bar 470mm for SC
    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":
    Answer by: Baader Web Team (Admin) on Mar 28, 2017 3:54:00 PM
  159. Rated: -5
    10/29/2017 3:27 PM Triband-SCT - Schmidt-Cassegrain-based Multi-Purpose-Telescope, for Sun and Deep Sky
    Can you use a Daystar Quark instead of the Solar Spectrum with the Tribune SCT?

    Answer rated: 10
    Yes, this will work - but even with the smallest Triband SCT (C8, 2000mm focal length) you will have effective
    8400mm focal legth because the Quark has a built in 4.2x telecentric system. The resulting magnification
    is very high, visually and photographically. Furthermore the Quark has a small aperture wich limits
    the field diameter and does not allow to use long focal lenght eyepieces and large sensor CCD/CMOS sensors.
    Answer by: Baader Web Team (Admin) on Nov 2, 2017 12:36:00 PM
  160. Rated: -5
    6/11/2017 3:47 AM Baader Safety CoolCeramic Herschel Prism 2" Photographic Version
    Greetings. I am having focusing issues with this product on a Televue NP 101 (non is) telescope. Are there adapters than can help with this?
    Thank you.

    Answer rated: 3
    If your problem only occurs with a camera, you can replace the 2" Clicklock clamp with the T-2-adapter #1508035 to attach the camera directly to the Herschel wedge.

    If you have problems with eyepieces, you can try to use the adapter #1508035 to attach another eyepiece clamp with T-2-thread - e.g. #2458100 - or an eyepiece, where the field stop is moved into the 2"-barrel, closer to the telescope.

    The Herschel Wedge requires a backfocus of 114mm, of this 47mm are used by the 2" Clicklock clamp. To measure the backfocus of your telescope, point the telescope at the full moon, hold a piece of paper behind it and measure the distance between the drawn-in focuser tube and the sharp image of the moon.
    Answer by: Baader Web Team (Admin) on Jun 12, 2017 10:15:00 AM
  161. Rated: -5
    1/9/2017 9:00 AM Hyperion Zoom 2.25x Barlow lens
    I have a newton 130/900 on eq2 and I have to connect my DSLR Canon EOS 100D through Hyperion Barlow; because the focuser is cheap I want to screw the barlow to the focuser thread. Is there an adapter that allows to screw the thread of the Hyperion Barlow (Focuser 1.25") and allows him even to use the 1.25" filters?

    Answer rated: 0
    Our ClickLock 2"/1.25" reducer would do the trick:
    It has a female T-2 thread inside that would thread directly onto your T-2 thread on your eyepiece clamp.

    The question is if you have the 25 mm of additional backfocus which would be required. If yes, then the ClickLock will hold the camera with absolute rigidity.
    The real question remains though. Please excuse but we question if the drawtube (the moving tube) of your focuser can be adjusted to be stiff enough to "wiggle" inside the holding tube.
    Answer by: Baader Web Team (Admin) on Jan 9, 2017 9:07:00 AM
  162. Rated: -5
    1/21/2017 7:19 AM Baader 2" to 1¼" ClickLock Reducer (T-2 part #15B)
    Can I use this to insert my 1.25" eyepieces into the Baader 2" ClickLock Diagonal Mirror (# 2956100) ?

    Answer rated: -6
    Yes, amongst others this is exactly the purpose of the ClickLock Reducer. Please check out the PDF under the tab downloads or see the first image in the "application images" gallery.
    Answer by: Baader Web Team (Admin) on Jan 23, 2017 8:39:00 AM
  163. Rated: -5
    7/6/2017 10:57 AM Baader D-ERF Energy Rejection Filter (75 - 180mm)
    I'm going to buy one for my Takahashi FS-152 doublet fluorite refractor with Daystar Quark. Which size should I choose? Will it fit my scope objective or do I need anything else? Thanks.

    Answer rated: 4
    To reach the full aperture of your telecope, you will need the 160mm D-ERF. Please note that our D-ERF filters are not cell-mounted by default, you will need to create a filter cell yourself.
    We do offer the service of 3D-printed D-ERF filter cells, customized on your telescope. However please note that this service is only valid in combination with a full purchase of Solar Spectrum H-alpha filter and D-ERF filter.
    Read more here:
    Answer by: Baader Web Team (Admin) on Jul 6, 2017 11:39:00 AM
  164. Rated: -5
    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: 8
    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
  165. Rated: -5
    7/13/2017 4:00 PM Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp
    Do the Baader prism diagonals with BBHS coating work well with refractors faster than f/7 or f/8? I am wondering if chromatic aberration (or spherochromatism) would be a problem as the light propagates through the glass prism.

    Answer rated: 6
    We do not recommend a prism for refracting telescopes unless the optical calculation of the objective lens calls for using a prism instead of a mirror.

    For 100 years - all Carl Zeiss Refractor telescopes were designed to compensate for the added glaspath of a prism.

    And throughout our 25 years of offering this prism we repeatedly found refractor telescopes - especially of very short focal length - where the airy disc went colorless only when adding a prism into the beam of light - as was the case with the "long gone" Astro Physics Traveler.

    So please check carefully with your existing mirror star diagonal if the first ring of the airy disc appears reddish when observing a bright star - or better when observing an artificial star at high magnification. if this is found to be the case then a prism will bring a noticeable improvement.
    If the first diffraction ring appears white already than a prism would not lead to an improvement but will induce a color error.
    Answer by: Baader Web Team (Admin) on Jul 14, 2017 11:12:00 AM
  166. Rated: -5
    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: -2
    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
  167. Rated: -5
    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: -1
    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
  168. Rated: -6
    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: -1
    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
  169. Rated: -6
    9/8/2017 7:44 AM 2" BDS-SC Baader Diamond Steeltrack Focuser
    Do you have adapters for Takahashi Mewlon or CN212?
    Thanks in advance.

    Answer rated: 6
    We do have a Mewlon-Adapter (M71/M72, item #2558231) and from that one an adapter M72 to M68 (#2558230). Into this, you could screw the male M68-thread of the RT Steeltrack. If this setup is too long, we do have the Ultrashort Clamp #2458196 - which of course is no focuser.

    Unfortunately, we do not know which thread is used on the CN212.
    Answer by: Baader Web Team (Admin) on Sep 13, 2017 3:44:00 PM
  170. Rated: -6
    9/20/2017 10:01 AM Bundle: Hyperion Universal Zoom Mark IV with Hyperion-Barlow 2.25x (8-24mm / 3.6-10.7mm)
    What is the field stop diameter for this lens?

    Answer rated: 0
    Because of the construction of a zoom eyepiece, the (effective) field stop depends on the focal length. You can find the data for several focal lengths in the PDF with the technical data which you can find under Downloads, the field stop diameter is in the column FS.
    The diract link to the PDF is
    Answer by: Baader Web Team (Admin) on Sep 20, 2017 11:47:00 AM
  171. Rated: -6
    10/15/2017 4:27 AM Baader H-alpha 7nm CCD Narrowband-Filter
    I have a non-modified Pentax K-1 DSLR camera. At the end of my t-ring is a 2" nose that accepts 2" threaded filters. Can I use this successfully for narrowband/Ha imaging on an unmodified Pentax K-1 DSLR camera with good results? I'm not expecting results as good as on a modified camera, but on an unmodified one is there at least some improvement when using this Ha filter and if so, how much? Please help. Thank you.

    Answer rated: 4
    You will see some improvement even with an unmodified camera. But be aware that the exposure time goes up
    very much when you only collect Halpha light
    Answer by: Baader Web Team (Admin) on Oct 19, 2017 2:31:00 PM
  172. Rated: -6
    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: 0
    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
  173. Rated: -6
    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: -4
    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
  174. Rated: -7
    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: 2
    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
  175. Rated: -7
    6/6/2017 9:45 AM Baader 2" ClickLock eyepiece clamps
    I have an 8 Edge HD with the Celestron HD Focal reducer and would like to use the combination of Baader ClickLock and a diagonal WITH the Celestron Edge HD focal reducer. What would be your suggestions if I would like to use the Baader ClickLock system for visual and/or AP, keeping in mind the required 105 mm from Reducer to camera sensor by Celestron, and do I need the Celestron T-adapter also?

    Answer rated: 19
    The SC-Clicklock has got a length of 47 mm, the distance from a T-2-adapter to the sensor of a DSLR is 55mm. Our T-2/2"-adapter #2408150 adds another 2.5mm, so you are at 104.5 mm which meets the tolerances pretty good - Celestron gives a tolerance of +/- 0.5mm for the EdgeHD. You may use the Baader T-2 adjustment/spacer-rings #2458102 for the perfect distance. The Celestron T-adapter is not required then.

    Visual use is a bit complicated, because a star diagonal like #2956100 already has got an optical length of 112mm incl. Clicklock clamp. You can remove the nosepiece, then you'll have a 2"-thread with which you can attach it directly to the reducer - but you'll need the NexStar Locking Ring #2458270 to rotate it into a convenient position. It is 5mm thick - please check if the thread at the Celestron reducer is long enough.

    But for visual observation, it is not as critical as for photography - we even have customers who have adapted a focuser to an EdgeHD and are happy with the results.
    Answer by: Baader Web Team (Admin) on Jun 12, 2017 12:25:00 PM
  176. Rated: -8
    11/3/2016 12:30 AM Baader T-Ring Canon EF (EOS) to T-2
    Does the Baader T-Ring for Canon EF (EOS) cameras allow the camera body to rotate relative to the telescope ? By the picture it appears this product is designed for that purpose but just want to confirm.

    Answer rated: -7
    Yes, this is possible by loosening the allen screws
    Answer by: Baader Web Team (Admin) on Nov 3, 2016 9:21:00 AM
  177. Rated: -8
    11/17/2016 1:23 AM Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp
    Does the 2" nose-piece accept standard 2" filters such as Lumicon UHC? If not, what adaptor would i need?

    Answer rated: -14
    The nosepiece for both 2" BBHS prism (2456117) and mirrror (2456115) is our Astro T-2 part #19: Baader 2" Nosepiece with 2" filter thread (#2408155). So it accepts all standard 2" filters with M48 thread
    Answer by: Baader Web Team (Admin) on Nov 17, 2016 10:32:00 AM
  178. Rated: -8
    1/18/2017 10:02 PM Maxbright Binocular incl. case
    Can you advise if one can lock the diopters on the G1 model to prevent rotation when zooming with a 2x zoom lenses (Hyperion Mk III) in the binoviewer? If so how can one do it?

    Answer rated: -1
    Unfortunately locking of the diopters is not possible.
    Answer by: Baader Web Team (Admin) on Jan 25, 2017 8:47:00 AM
  179. Rated: -8
    7/16/2017 4:11 PM Hyperion Zoom 2.25x Barlow lens
    Can the main body of the Hyperion Zoom Barlow 2.25X be used with the other Hyperion eye pieces, such as the 8mm #245608, or the 24mm #245624? What would be the proper configuration?
    Thank You!

    Answer rated: -10
    You can use the Hyperion Barlow with every 1,25"-eyepiece if you use the included adapter A. With it, you get a standard 1,25" filter thread like it is available on the Hyperion eyepieces.
    Answer by: Baader Web Team (Admin) on Jul 17, 2017 8:18:00 AM
  180. Rated: -9
    2/28/2017 3:46 PM Baader 2" ClickLock Okularklemmen (von T-2 bis 3,5")
    I would like to know the lenght of the optical path of the baader click lock for SC (6,8,91/4) - excluding the female thread SC (total lenght - female thread lenght SC)

    Answer rated: 1
    The female SC thread is 10,5mm long. Thus the optical path length without the thread (and also the full width depth 2" eyepieces can be inserted into the Clicklock) is 36,5mm.
    Answer by: Baader Web Team (Admin) on Mar 1, 2017 11:05:00 AM
  181. Rated: -9
    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: 1
    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
    Answer rated: -1
    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
  182. Rated: -9
    10/12/2016 10:09 AM Telecentric System TZ-4 (4x focal length)
    ich will dieses telezentrisches 4 mal das System nur für visuelle Beobachtungen an der Trompete refractor 70 mm mit einer Brennweite von 420 mm und mit dem H-ALPHA Filter Omega-0.15 Nm.
    jetzt ich benutze den normalen 3x telezentrisches Barlow, aber die Protuberanzen sichtbar nicht hell.

    Answer rated: 1
    Wir kennen die Filter von Omega nicht und können daher nicht sagen wie sie mit unserem telezentrischen System harmonieren. Unser telezentrisches System ist NUR für die Verwendung mit SolarSpectrum und DayStar Filtern zugelassen.Von Experimenten mit anderen Filtersystemen raten wir dringend ab. Wir möchten Sie warnen das Sie Ihr Augenlicht gefährden wenn Sie optische Komponenten von verschiedenen Herstellern in nicht vorgeschriebener Weise kombinieren.
    Answer by: Baader Web Team (Admin) on Oct 27, 2016 3:10:00 PM
  183. Rated: -9
    2/2/2017 7:55 AM Baader Hyperion Universal Zoom Mark IV, 8-24mm eyepiece (1¼" / 2")
    Is the optics of this zoom eyepiece improved or modified if compared to the previous version? If yes, how?

    Answer rated: 9
    Many things have changed on the new Mark IV version as you can see in the product description and the instruction manual. Amongst others 4mm backfocus gain, improved zooming mechanism even at cold temperatures, new safety-kerf barrels and so on. However, we didn't see a need to change the proven, high-quality optics of the Hyperion Zoom. It is and always has been performing very well.
    Answer by: Baader Web Team (Admin) on Feb 2, 2017 10:33:00 AM
  184. Rated: -11
    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
  185. Rated: -11
    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: 4
    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
  186. Rated: -11
    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: -22
    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
  187. Rated: -12
    9/26/2016 3:04 PM Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
    Can I use an UV/IR-Cut filter or the BBHS mirror in front of an H-Alpha or Calcium Solar Filter? Do you recommend the 2" BBHS or 2" Clicklock Mirror for solar observation?

    Answer rated: 6
    If you want to observe the sun in H-Alpha, we recommend the standard dielectrical Clicklock mirror (# 2956100) in combination with a suitable filter combination, because the dielectrical filter reflects less radiation below 380nm and above 740nm. This way, the mirror can reduce the strain on the following filters at least a little bit.Please do also use an energy rejection filter in front of the telescope to reduce the strain on the filters as much as possible.

    We highly advise against visual calcium observations of the sun - the 397nm of Calcium are already ultraviolet radiation, and UV-radiation can cause phototoxic reactions which can harm your eyes. In addition, even young people can't see these wavelengths very good, and sensitivity decreases with the age. Because of this, the eye doesn't feel if the intensity is much too high. If you now try to increase the amount of radiation (e.g. with another mirror) to achieve a brighter image, you will increase the risk for eye damage. According to the newest norms for eye safety and to ophtalmologist conclusions, the sun must not be observed visualy at 397nm.

    We highly advise to only observe the sun in calcium photographically, then you also do not need a star diagonal. We can't understand why some manufacturers promote these calcium-filters for visual observations.

    We also advise against placing a filter so close to the focus - any energy rejection filter belongs in front of the front lens, even if this sets high demands to the quality of such a large filter. Placing the filter close to the focus will save money, because you can use a much smaller filter, be we absolutely can't recommend it - because of our own conscience as well as because of EU-regulations. The filter would receive all the energy collected by the front lens. We can only recommend putting the energy rejection in front of the front lens, which is the ethically and technically correct method.
    Answer by: Baader Web Team (Admin) on Oct 14, 2016 9:32:00 AM
  188. Rated: -12
    11/3/2016 9:11 AM Baader 2" ClickLock Diagonal Mirror
    Choosing Clicklock diagonal - exact dimensions needed.

    Answer rated: 13
    We received this question (with more content and images) via email and published the question & answer including images on our blog:
    Answer by: Baader Web Team (Admin) on Nov 3, 2016 9:11:00 AM
  189. Rated: -12
    12/29/2016 12:24 PM Baader Multipurpose Finder Bracket MQR IV 9x60 finder (max diameter 72mm)
    Hi does this item fit my C11 Edge HD where the standard finder mounts to?

    Answer rated: 7
    Yes, the MQR IV will fit an C11 Edge HD
    Answer by: Baader Web Team (Admin) on Jan 4, 2017 3:07:00 PM
  190. Rated: -12
    1/29/2017 5:39 PM Baader 2" ClickLock eyepiece clamps
    The drawing in the application images does not yet include the M54 version. How much is the increase in the optical path length for this M54 ClickLock clamp?

    Answer rated: 16
    Thanks for bringing this to our attention. We've updated the technical drawing, please check out the image on the left. The optical path length of the M54 ClickLock is 30 mm
    Answer by: Baader Web Team (Admin) on Jan 31, 2017 4:53:00 PM
  191. Rated: -13
    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: 7
    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
  192. Rated: -13
    7/3/2017 5:01 PM Baader U-Venus-Filter (350nm)
    Could I have a 1" UV-Venus (350nm) filter custom made?

    Answer rated: 4
    Unfortunately, we can not offer custom made filter sizes in small quantities. We do not "cut" the finished filters from a large glass plate, instead we take a filter disk, which is then polished and coated. So, every filter disk is completely coated, and the coating does not age. But we can't simply cut a smaller filter from a larger one, this would damage the coating. You'd have to buy several hundred filters; for further information please take a look at
    Answer by: Baader Web Team (Admin) on Jul 5, 2017 8:44:00 AM
  193. Rated: -13
    7/21/2017 9:55 PM Solar Viewer AstroSolar® Silver/Gold (1pc, 10pc, 25pc, 100pc)
    Where are the Solar Viewer AstroSolar® Silver/Gold glasses manufactured?

    Answer rated: 6
    As stated in the product description, our Solar Viewer AstroSolar® Silver/Gold glasses are completely Made in Germany.
    Answer by: Baader Web Team (Admin) on Jul 24, 2017 11:02:00 AM
  194. Rated: -13
    2/8/2017 8:49 PM 2" Glasspathcorrector® 1,8x for Refractors and SC's
    1.8x glass path combined with T2 Zeiss prism.
    I am wondering if I can use the 1.8x glass path in front of the Baader T2 Zeiss prism + maxbright binoviewer? I see it is just recommended to be used in front of the mirror diagonal, not sure if it will perform worse in prism diagonal?

    Answer rated: -17
    The 1.8x GPC (2") was designed for the T-2-mirror, but that does not mean that you can't use with a prism. Unfortunately, there is no easy answer to the question, which combination works better. In some cases, a prism might work better than a mirror, but this depends on the colour correction of apochromatic refractors and can only be verified by testing it at the telescope - there are too many combinations and designs. Usually, the mirror is recommended.
    Answer by: Baader Web Team (Admin) on Feb 13, 2017 8:12:00 AM
  195. Rated: -14
    3/5/2017 2:52 PM Baader Multi-Purpose Vario Finder 10x60 (single or with MQR-IV finder holder)
    If I remove(unscrew) the knurled ring that holds the eyepiece what threads are present? Are they male T threads? I wish to attach a 0.5 kg guiding camera which has female T threads. While I can attach a 1.25" nosepiece to my camera, I believe that threading it on directly would reduce the potential for flexure. Thanks for your help.

    Answer rated: -1
    If you remove the 45° erecting prism and also the 1 1/4" clamp that holds that prism in place, the sliding tube will expose a male T-2 thread.
    However - the distance to the focal plane of the camera will need to be extended - consider to order a T-2 40 mm extension ring:
    Answer by: Baader Web Team (Admin) on Mar 6, 2017 8:31:00 AM
  196. Rated: -14
    3/12/2017 1:10 PM Hyperion Zoom 2.25x Barlow lens
    What is difference between Q barlow 2.25 and Hyperion barlow 2.25? Is it possible to click Hyperion Zoom to Q-turret barlow? Thank you

    Answer rated: -6
    The Hyperion Barlow is a triplet-lens-flatfield design. While the Q-Barlow would fit, the Zoom-Barlow is dedicated to the Hyperion-Zoom, yielding better images at high magnification than any other barlow that is not matched to the Hyperion-Zoom optical system.

    The Q-Barlow is a classic doublet-lens design. Optically it works absolutely on par with other doublet barlow-lens designs - but it offers that extra tack of magnification (2.25x instead of 2x - just like the Zoom Barlow) so that eyepiece focal lengths are not just cut in half to repeat itself.
    With a 2x barlow you produce a 5 mm effective focal length out of a 10 mm eyepiece - or receive a 6 mm eyepiece from a 12mm eyepiece. But it is very likely that exactly those focal lengths the eyepiece manufacturer is offering already. So - in the case of the Q-barolw, the purpose of the 2.25x is to convert a 10 mm eyepiece into a 4.5 mm or a 20 mm eyepiece into an 8.9
    Answer by: Baader Web Team (Admin) on Mar 13, 2017 8:55:00 AM
  197. Rated: -14
    11/27/2016 2:55 AM Telezentrisches System TZ-2 (2-fache Brennweite)
    I want to use the Telecentric TZ-2 with Lunt LS80THa scope. Do you have any experience, design, instructions how to integrate it?

    Answer rated: -1
    The Telecentric Systems we offer are designed for other filter systems, like DayStar and SolarSpectrum. We do not recommend to use them with other kinds of solar filters. We do not have any experience or instructions how to integrate in other systems but we must warn you that every change on a solar telescope may lead to danger for your eye and therefore it´s on your own risk!
    Answer by: Baader Web Team (Admin) on Nov 28, 2016 12:33:00 PM
  198. Rated: -15
    2/9/2017 3:14 PM Baader T-Ring Sony E/NEX Bayonet with D52/M48 to T-2
    I bought this ring for my Sony A7s. I cannot take the T2 from M48 ring, could you help me ?

    Answer rated: -7
    A very easy and frustration-free way to do this, would be to purchase our adjustable pin-type face wrench. With this tool you can apply force on both drillings and easily unscrew the T-2/M48 ring counterclockwise from the M48/S52 ring. See here:

    It is also possible with other tools, such as a small and rigid screw driver. But this way you can only insert it in one drilling and have to apply a lot more force to unscrew it counterclockwise, but it is possible.
    Answer by: Baader Web Team (Admin) on Feb 9, 2017 3:41:00 PM
  199. Rated: -16
    4/1/2017 1:17 PM Baader Male T-2 Dustcap, inner thread M42 x 0,75
    Are these available for 2" / M48 threads? If not yet, when?!

    Answer rated: 3
    Unfortunately, no. We do not offer our threaded dustcaps in M48 or 2" size and currently do not plan to produce them.
    Answer by: Baader Web Team (Admin) on Apr 3, 2017 8:43:00 AM
  200. Rated: -17
    8/17/2017 2:43 PM Baader 2" ClickLock eyepiece clamps
    I'm looking for a 2" clicklock solution to my Explore Scientific 80 mm ED APO. Unfortunately I cant find the appropriate dimension in your selection. The scope side connection has an external M54 threading (0,75). Can you suggest a solution for me, if necessary in combination with an adapter? I earlier purchased a clicklock for my C14 and I am very happy with the quality of this product.

    Answer rated: -6
    We do have an M54 ClickLock but this has also an M54 external thread (fitting for Skywatcher/Orion). So you would need an inverter ring from M54 external to M54 internal thread. Unfortunately we don't have such an adapter or another solution. The only adapter we have that would fit is our DT-Adapter II (#2458040) - but this would reduce the inner diameter to T-2 and you would have to get a T-2 inverter ring and then use our 2" T-2 Clicklock. Not the best solution...
    We would suggest to get an M54 inverter ring custom made at a milling company. There is a company in Germany who does such things, but we don't know if they ship international:
    Answer by: Baader Web Team (Admin) on Aug 17, 2017 3:38:00 PM
  201. Rated: -17
    7/8/2017 9:26 PM Baader 2" ClickLock eyepiece clamps
    I have a Celestron 8se and an Altair Starwave 70ED Triplet Travel Refractor, I also have a Nikon DSLR as well as 1.25 & 2inch eyepieces...

    I would like to try and figure out which clicklock item I can use with whatever combination I wish to try, but I am finding all this a bit confusing as I don't understand all the various threads etc..

    Can you help me please? (I may need some diagrams to help understand)

    Many thanks,

    Answer rated: 5
    For the C8, you need
    #2956220 SC / HD-Clicklock (6", 8", 9¼" SC and EdgeHD)

    For the Altair, you'd have to check the manual to be sure, we do not have the data for all telescopes. According to their website, it should offer an M54x0,75 if you remove the original eyepiece clamp. Then the
    #2956254 M54-ClickLock (Skywatcher / Orion - but not for Bresser Hexafoc)
    should fit. If it doesn't, Altair mentions a M54-to-M48-adapter for CCD-cameras - if youbhave this one, you can use
    #2956248 M48-ClickLock (2" Filterthread)

    Then you have a standard 2" eyepiece clamp and can use 2"-accessories as before, your old 1,25"-adapter (or an optional Baader 2" to 1¼" ClickLock Reducer #2956214), or for your camera the Baader 2" / T-2 Nose Piece and Camera adapter #2408150 plus T-Ring Nikon to T-2 #2408300. You may need additional T-2-extension tubes to reach focus with your refractor.
    Answer by: Baader Web Team (Admin) on Jul 10, 2017 8:23:00 AM
  202. Rated: -18
    3/8/2017 7:09 AM Baader Multi-Purpose Vario Finder 10x60 (single or with MQR-IV finder holder)
    Can I use this with MQR IV finder holder on TEC 140 telescope with feather touch 3545 focuser? Thanks.

    Answer rated: 6
    Yes, it will fit. But be careful when threading in the screws - you may need to add one or two washers per screw to avoid the screw-tips to scratch against the moving tube beneath
    Answer by: Baader Web Team (Admin) on Mar 8, 2017 12:31:00 PM
  203. Rated: -18
    9/21/2016 4:01 AM Baader Safety CoolCeramic Herschel Prism 2" Photographic Version
    With the Herschel Prism photographic version, is the idea that you can replace the ND3.0 filter with one of the other ND filters and get a brighter image for doing photography? It sounds that way from how you describe it but I just wanted to make sure that the ND3.0 can be taken off and replaced with one of the other filters. Thank you.

    Answer rated: -3
    Yes, that is correct. To achieve a brighter image and thus shorter exposure times, the ND 3.0 filter can be replaced with an ND 1.8 / 0.9 / 0.6 filter. This is only for photographic use, do not use it visually afterwards!
    Answer by: Baader Web Team (Admin) on Sep 21, 2016 3:10:00 PM
  204. Rated: -21
    10/21/2016 10:57 PM Baader T Adapter (BTA) for SC and MAK Telescopes (T-2 part #21)
    Can the T thread section be rotated relative to the SCT thread section and locked in any chosen orientation of the camera? There appears to be a locking screen (possibly even three of them) to do this but it is easy to misinterpret images on a web page.

    Answer rated: 10
    Indeed - the T-2 section can be rotated into any desired position with the camera firmly on - and then the rotational position of the camera is locked by rotating the big 2" nut onto the 2" SC-thread. Inside the mechanism you can see three pressure plates in 120° spacing. This may have irritated you as it indeed looks similar to some dead lock solution. However - this is just to increase pressure when locking down the SC-nut, so that the T-2 thread cannot slip sideways once the 2"nut is tightened down. However it does not hinder free rotation of the T-2 thread at all during finding the optimum rotational position of the camera. We hope it answers your question satisfactorily.
    Answer by: Baader Web Team (Admin) on Oct 24, 2016 3:07:00 PM
  205. Rated: -22
    12/29/2016 3:49 PM Baader T-Ring Pentax K to T-2
    I want a connecting ring between my Pentax K200D and the Multi Purpose Coma Corrector # 2458400. The coma corrector fits to a Newtonian telescoop from GSO (Guang Sheng Optical, Taiwan), the F4 model (reflector 200mm, focus 800mm). The only thing is that the register distance between the corrector and the filmplane must be correct for Pentax K. Registerdistance is the distance from last lenselement from a Pentax lens to the filmplane which is 45,46 millimeter.

    Your website about your Baader T-ring tells, quote: “Represents the standard exact distance of 55.0mm from the front support surface of the T-ring to the image plane of the camera body forth”

    Now, this 55,0mm is longer than the 45,46mm registerdistance from Pentax.
    Does the ring still work and let focus?

    Answer rated: 25
    The Pentax K indeed has got a flange focal distance of ~45mm - but this in fact is the distance from the (bayonet) lens flange at the front end of the camera body itself to the sensor inside the camera.

    If you use a PENTAX T-2- T-ring-adapter (for instance our item # 2408302), you gain the exact additional distance to produce the required distance of 55mm with your PENTAX camera body.

    55 mm is a well established industry standard for DSLR-T-2 rings (dating back to the days of SLR-emulsion films). Accordingly the T-2-rings matching different DSLR-cameras have got different heights. This is to provide a standard lens distance for any DSLR camera body, so that also third party lenses (Tamron, Soligor a.o.) can be used on any DSLR camera.

    This is the reason why the MPCC had been designed for the 55 mm focus distance.

    Today the standard has "softened" somehow with the advent of mirrorless 4/3 cameras and many other imaging tools that continue to replace DSLR-cameras these days. It is the reason why we have been designing a multitude of other variable length adapters like the "Vari-Lock-system". Also many modern telescopes do require larger light cone throughput than the T-2 standard can supply. For this reason the latest design of the MPCC even can unthread the T-2 male thread and be attached with the outer M48 thread supplied at the camera-end of the MPCC. However, finding the right parts for producing the correct sensor-distance is somewhat trickier than using the well established T-2 standard.
    Answer by: Baader Web Team (Admin) on Jan 9, 2017 8:51:00 AM
  206. Rated: -37
    9/1/2016 12:33 PM Canon Camera Astro Upgrade
    I am thinking of removing the IR filter of my Canon EOS 6D. I have heard that when you modify a camera for astrofotography it is possible to keep the IR blocker, and remove just the H-alpha absorbing filter alone. Is this true? Is this the best thing to do?

    In any case, in order to decide whether I do it or not, I would like to know the following:

    a) What is the price of the operation?
    b) What do I lose (auto-focus, white balance, focus to infinity with some lenses...)?
    c) What do I gain? Do you have an example before/after?
    d) Does the operation has any warranty?
    e) How much time does it take to do it?

    Thank you!

    Answer rated: 7
    With our Astro Upgrade we exchange part of the camera filter stack, afterward the camera has the same UV and IR blocking as before, but especially the range around Halpha gets high transmission.
    a) the current price for 6D Astroupgrade is EUR 345,- + BCF2 filter EUR 84,-
    b) since it is a exchange with a perfectly matching filter, developed especially for this application autofocus and infinity will function as it was before. White balance have to be adjusted manually afterwards.
    c) you gain multiple sensitivity in Halpha, but with keeping all other functionalities as the original camera. Pls. note the many images in the internet and the Eta Carinae image in the background of our Canon Kamera Astro Upgrade page.
    d) the original warranty of the camera will stay, also we give a warranty for the modification itself. In case of warranty you would have to give this camera back to us.
    e) this depends on the actual chain, expect 2-3 weeks after your camera arrived here.
    Answer by: Martin Rietze (Admin) on Sep 5, 2016 9:39:00 AM
  207. Rated: -41
    9/2/2016 5:37 PM Baader 2"/90° Astro Amici-Prism with BBHS ® coating
    Would love to order one of these - will they be available any time soon?

    Thanks in advance!

    Answer rated: -11
    Sorry, it will still take another 3-4 months. We went out of housings for this product so we made a completely new construction. Please have a bit more patience until this high-quality product will finally be available again.
    Answer by: Baader Web Team (Admin) on Sep 5, 2016 4:51:00 PM