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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"?
Question by: Waqas Ahmad on Oct 10, 2016 7:54:00 PM | 1 Answer(s)
What are the threads and pitch of your 1.25" and 2" filters?
Question by: Anders G. on Sep 20, 2017 12:55:00 PM | 1 Answer(s)
Rating of Question
51
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
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).
Question by: Keith on Mar 6, 2017 9:34:00 AM | 1 Answer(s)
Rating of Question
40
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
Do you have a transmission diagram for your ir-pass filter. I found one from one of your suppliers but do not know if this is relevant or there have been changes. Above all, I want to ensure the damping up to 300nm.
Question by: Håkan Barregård on Aug 3, 2020 2:36:00 PM | 1 Answer(s)
Rating of Question
1
We don't have a transmission diagram for this filter ourselves currently. The base of the filter is a Schott-equivalent absoption glass RG 630 (you can look up its properties in the Schott catalogue). For this reason it is assured that blocking is effective down to 300 nm.
Answer by: Baader Web Team (Admin) on Aug 4, 2020 3:22:00 PM
Does it make sense to use this filter in a color camera, like ASI462, to shoot planets? If so, how to shoot the RGB channels?
Question by: Rafael Sampaio on Aug 18, 2022 7:19:00 PM | 1 Answer(s)
Rating of Question
0
This dependes on the sensitivity of the camera, and if it includes a built-in or removable IR-blocking filter. A camera like the QHY 5-III-462C has got a removable IR-filter and is designed for IR-sensitivity. The ASI 462 looks promising, too, according to the QE curve published for it.
So yes, the filter can be used with colour cameras, too, if they are sensitive for IR.
To take RGB, you have to remove the filter and then can take RGB in one shot as usual. If possible, replace it with a UV/IR-cut filter like Baader UV/IR-Cut / L-Filter 1¼" – CMOS-optimized #2961570. The focus or your telescope's color correction might beslightly different for RGB and IR, so check the focus again.
For changing the filters, we'd recommend either filter drawers like our UFC system, or a filter wheel. That's the fastet way, and you don't change the orientation of the camera, which makes combining the colour channels easier, and you can use flats.
Answer by: Baader Web Team (Admin) on Aug 19, 2022 9:23:00 AM
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Pictures...
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About Baader Filters
The variety of uses for filters in amateur astronomy has considerably increased during the last decade, enabled by both more accurately manufactured optical accessories, and, above all, by the “digital revolution“....
What do you look for in an astronomical filter? Everyone has different requirements and goals and with a myriad of filters available today; how do you choose the right filters...
What do you look for in an astronomical filter? Everyone has different requirements and goals and with a myriad of filters available today; how do you choose the right filters to unleash the full potential of Astrophotography?
In this blog our customer Ian Aiken gives some high level advice on what to look for when choosing a filter, coupled with reasoning why he choose the Baader's CMOS-Optimized LRGBand Ultra Narrowband f/2 filters, along with example LRGB and SHO images taken with these filters on his Celestron RASA 11 from his Bortle 7 suburban location.
Blog Post by Ian Aiken:
I live in the North East of England in the United Kingdom, which experiences a temperate maritime climate characterized by mild summers and cool winters. Cloudiness can vary throughout the year and it feels like I only get 20 usable clear nights per year at my Bortle 7 location during the 6 months where astronomical darkness actually occurs. I've been an Astrophotographer for over 20 years and I've had all kinds of telescopes, mounts, filters (including Optolong, Astro Hutech, Chroma, Baader) and cameras (Atik, QHYCCD, ZWO, Canon) in this time, for both planetary and deep sky photography. Financially, I've learnt the hard way through fine tuning my current collection to something which supports my sky conditions, budget, time, and imaging goals.
Currently I own a Skywatcher EQ8 mounted in my roll off roof observatory. On this I have a RASA 11 with Baader UFC, QHY268M camera and Baader's CMOS-Optimized LRGB and Ultra-Narrowband f/2 filters.
Here are the factors I've considered when choosing my filters:
Price: Assess the price of the product in relation to its features, quality, and performance. Is the price reasonable and competitive compared to similar products in the market? Consider whether the product offers significant advantages or unique features that justify its price.
In my opinion, Baader filters are absolutely value for money. They've kept the price competitive and performance high. A set of Baader filters costs a little more than a single Chroma. Chroma are good, but did not feel value for money in comparison (Baader 2" LRGB set ~ € 500 vs. Chroma LRGB ~ € 2.238).
Quality: Examine the quality of the product. Does it meet your expectations in terms of durability, craftsmanship, and overall build quality? A product that is well-made and built to last will provide better long-term value.
Baader CMOS-Optimized filters come with Baader Planetarium's Life-Coat technology. Baader warrant the coatings for the life of the filter guaranteeing that the coatings will not peel, flake or physically degrade and they have no issues with you cleaning the filters with fine optical cleaning equipment. You can see the build quality is high, the coatings look durable, and I can understand how Baader can offer such a life time warranty. I don't think anyone else offers this.
Performance: Evaluate how well the product performs its intended function. Does it deliver the expected results or fulfil your requirements? Consider its efficiency, accuracy, reliability, and any additional benefits it provides compared to alternative options.
I'm going to post some images later in this blog, and you can judge the quality for yourself. Yes, there were initial problems with halos and these have been resolved. I haven't had any issues that I am concerned about. Halos can be a real pain, and it's not always the filter that causes this (most cases it is not the filter). Reflections can occur in your imaging system and could be caused by a number of factors: including spacing between optical elements; distance to CMOS camera; the CMOS camera front window itself etc. You have to spend time to understand your entire optical system and its individual nuances.
Features and Specifications: Review the features, specifications, and capabilities of the product. Are there any unique or advanced features that differentiate it from competing products? Determine whether these features are essential to your needs and whether they justify the price.
I opted for high-speed ultra-narrowband to match with my RASA 11. This was based upon my needs (explained a bit further below). In terms of features, what stood out was the features integrated into the filters to help prevent reflections and halos. For instance:
Reflex-Blocker - with coatings to reduce halos caused by my imaging system.
Parfocal - this helps to not have to refocus so much during a filter change. As a filter change is manual on my RASA 11 with the Baader UFC system, it means less movement with my motorised focuser and I am back to imaging quicker (and the focuser isn't off on some mission to reach focus by going further out of focus, which can happen when using an SCT type design).
Blackened edges - again to help reduce reflections in my imaging system, lots of mirrors and glass = high potential for reflection
Sealed Coating Edge - each filter is coated individually and not cut from a sheet. This is probably why they will last forever, and Baader are able to offer Life-Coat warranty.
Brand Reputation and Customer Reviews: Research the brand's reputation and customer reviews of the product. Look for feedback from other customers who have used the product to gain insights into its performance, reliability, and customer satisfaction. Positive reviews and a strong brand reputation can indicate better value for money.
Baader Planetarium have been in business since 1966. I've never experienced any poor customer care from dealers or Baader directly (I admit, I've not really had any issues either, with exception of one issues with the early Baader Steeltrack software which was swiftly resolved by Baader themselves). As a family run business, I feel they are passionate with what they do, and want to do the right thing at the right price, making astronomy accessible to all budget types, and truly are Aiders in Astronomy (this is their slogan).
Longevity and Future Compatibility: Consider the product's longevity and future compatibility. Will it remain relevant and usable for a reasonable period? Assess whether the product is upgradable or compatible with future advancements or technologies to ensure its value over time.
I have the older Baader 2" CCD filters which are in the same condition that I purchased them in. I have no concerns about the longevity of the Baader CMOS Optimised filters, especially backed by the Life-Coat warranty. 2" filters are going nowhere, and while the sensors on modern CMOS cameras are getting larger, I cannot see the need to upgrade anytime soon. I've been using 2" filters for the past 20 years.
Warranty and Customer Support: Evaluate the warranty offered by the manufacturer and the availability of customer support. A reliable warranty and responsive customer support can provide additional value by offering peace of mind and assistance in case of any issues or defects.
Baader offers Life-Coat, a lifetime warranty on their CMOS-Optimized filters (providing used and handled correctly). As a family run business operating for over 50 years, Baader are trustworthy and offer great customer support.
Personal Needs and Preferences: Finally, consider how well the product aligns with your specific needs, preferences, and intended use. Different products may cater to different requirements, so it's essential to choose one that best suits your circumstances and priorities.
What did I choose?
I decided on the Ultra Narrowband High-Speed filters on my RASA 11. Why? Well, the reasoning may surprise you. While the filters are excellent value for money, my garden backs onto other gardens and my neighbours have lots of LED lights lit, especially on weekends when it's not windy, the moon is not out, and the sky conditions are good. You can picture the challenges already. Also, there are trees which do not belong to me which get in the way. I work full time, and have two small children, time is limited. I'm middle-aged, but not retired, so I cannot stay up all night imaging into the early hours. So, I went for a RASA for high speed imaging, reducing my imaging time significantly. While I may image across multiple nights, I don't need to. It just works for my current situation. The Baader filters are brilliant on the RASA 11, and I'm able to produce some excellent results (see further in the blog) even with all my challenges.
I hope the above helps you make a decision on what filters would be good for your needs. Baader Planetarium has a really nice tool to help you match which filters would be best for your imaging system. At time of writing you can access this tool: Baader Narrowband-/Highspeed Filter Selector
Example of Astrophotography taken with Baader CMOS Optimized Filters
I could talk about how tight the stars are (they are), how the filters have much more contrast than their predecessors (they do), but this can still be very subjective and influenced by sky conditions. My skies aren't great, they really aren't, and I have to battle with all the other issues living in a suburban environment. These images were also shot in reasonably poor conditions with thin haze. I also have to point out that I don't spend a massive amount of time processing my images. I think partly, if you capture good data you can produce a good image. You don't, in my opinion, need to push an imagine in processing so that it looks so bright and colourful. To me this looks over processed, and I prefer the darker looking style images with simple histogram and curves transformations. There's the disclaimers out of the way.
My workflow consists of using PixInsight to Calibrate, Stack, Automatic Background Neutralisation, BlurXterminate, NoiseXterminate, and maybe StarXterminate. I may use TGV Denoise post stretching but haven't on these examples. I simply use the ScreenTransferFunction (STF) in PI applied to the Histogram, and a hint of Curves Transformation before exporting off into a PNG/JPG. There's probably so much more I could do, but I don't. Oh, I nearly forgot. I do use PhotometricColorCalobration in PixInsight, which applies a white balance to the image.
NGC 7023 - The Iris Nebula 2 hour integration from Bortle 7 sky
NGC 7023, also known as the Iris Nebula, is a captivating and visually striking celestial object located in the constellation Cepheus. This reflection nebula lies approximately 1,300 light-years away from Earth, and its unique features have made it a favourite target for amateur and professional astronomers alike. The Iris Nebula gets its name from the distinct shape and appearance of its central region, which resembles an iris or an eye. This prominent feature is created by a dense cloud of interstellar dust, which scatters and reflects the light emitted by nearby stars. The dust particles in the nebula also create intricate dark filaments, adding to its overall visual allure. At the heart of NGC 7023 lies a young star cluster, illuminating the surrounding gas and dust with its intense radiation. This interaction gives rise to the vibrant hues of blue and yellow seen in many astro photographs of the nebula.
Imaging System: QHY286M CMOS Camera mounted on RASA 11 with Baader UFC. Filters: Baader CMOS Optimised LRGB Mount: Skywatcher EQ8 Exposure Details: 30 x 60 seconds each channel (LRGB). Total 2 hours integration time from Bortle 7 skies.
NGC 7635 - The Bubble Nebula 17 Hour Integration from Bortle 7 Sky
NGC 7635, famously known as the Bubble Nebula, is a captivating and visually stunning emission nebula located in the constellation Cassiopeia. Its unique structure and distinct appearance have made it a popular target for both amateur and professional astronomers. The Bubble Nebula derives its name from the spherical bubble-like structure at its center, which is created by the powerful stellar wind and radiation emitted by a massive, hot, and young central star. This star, known as BD+60 2522, is estimated to be several times more massive than our Sun and emits intense ultraviolet radiation, which ionizes the surrounding hydrogen gas. The ionized gas then emits light, creating the striking reddish glow seen in images of the nebula.
Imaging System: QHY286M CMOS Camera mounted on RASA 11 with Baader UFC. Filters: Baader CMOS Optimised 3.5/4nm f/2 Ultra Highspeed (Ultra-Narrowband) filters. Mount: Skywatcher EQ8 Exposure Details: Ha: 354x60s, SII: 121x60s & 104x120s, OIII: 175x120s. Total ~17 hours integration time from Bortle 7 skies.
Don't ask why the varying exposure! I'd also like to collect more data on SII and OIII in due course given it's about half of what I planned and need. You can tell by the images more is needed. Maybe next time, right? Astrophotography is for life not just for Christmas, or something like that…
I mixed the combination using PixelMath in PixInsight.
NGC 7635 - Baader f/2 3.5nm Ha CMOS-OptimizedNGC 7635 - Baader f/2 4nm OIII CMOS-OptimizedNGC 7635 - Baader f/2 4nm SII CMOS-OptimizedNGC 7635 - RGB/SHO Combination with StarsNGC 7635 - RGB/SHO Combination with Reduced StarsNGC 7635 - RGB/SHO Combination without StarsNGC 7635 - RGB/SHO Combination Crop
And finally to finish off, M45 taken with Baader CMOS-Optimized LRGB on same kits as above.
Der (das?) Filter macht sich sehr gut z.B. bei monochromen Mondaufnahmen. Er setzt in einem Bereich ein, der das Seeing mildert, die CMOS-Cameras aber noch gut empfindlich sind. Verarbeitung und Qualität sind super!
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Allan
304/11/2021
01/11/202118:11
more than 4 year(s)
Rating:
Great product
Solid filter frame, optically excellent filter
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Michael S.
339/12/2020
05/12/202015:00
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Mond und Venus mit dem Baader IR-Passfilter (685nm)
Ich habe diesen Filter für zweierlei Anwendungen erworben - zum einen, um hiermit Aufnahmen der tiefstehenden Venus zu machen, bzw. mit Hilfe des Filters die schlechten Seeing-Bedingungen aufgrund des tiefen Standes im Westen zumindest etwas zu verbessern, zum anderen, um diesen langwelligen Bereich des IR-Passfilters aus denselben Gründen unterstützend für Aufnahmen des Mondes einzusetzen, um hier die Qualität der Videoaufnahmen ("lucky imaging") ebenso zu steigern.
Abgesehen vom Baader IR-Passfilter wurde für die Aufnahmen der Venus auch noch der https://www.baader-planetarium.com/de/u-venus-filter-(350nm).html verwendet.
Harmoniert perfekt mit meiner ZWO Asi monochrom Kamera
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Thomas
134/05/2019
15/05/201914:27
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Mondmosaik
Konnte im April 2019 das gute Seeing inkl. dem IR-Pass 685 nutzen und habe mit meinem
180/2700 Maksutov und einer QHY 5III 290 mono Planetenkamera ein Mondmosaik aus 40 Panels erstellen.
Die Fotos zeigen das gesamte Mosaik und zwei Aussschnitte.
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Thomas Bessas
325/11/2018
22/11/201811:06
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Mars und Mond mit dem IR-Passfilter (685nm)
Nachdem ich noch einen Platz in meinem manuellen Filterrad frei hatte, viel die Wahl auf den IR-Passfilter (685nm).
Von meinem Standardplatz im Garten aus, habe ich den Mars und den Mond am 17.11.2018 aufs Korn genommen.
Mein Sichtfeld geht über unser Haus und das Gästehaus der Nachbarn.
Die Qualität des Filters war einwandfrei, wie man es von Baader gewohnt ist. Er lässt sich sicher im Filterrad verschrauben.
Anbei zwei Aufnahmen von Mars (nur noch 10" groß) und dem Mond.
Beide wurden mit einem Maksutov 180/2700 und einer ALccd-QHY 5III 290 mono aufgenommen.
Die Belichtungszeit muss leicht erhöht werden, da der IR-Passfilter doch etwas abdunkelt.
Ich persönlich werde in Zukunft für Planeten- & Mondaufnahmen auf den Filter nicht mehr verzichten!
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Bergwurm
262/09/2018
20/09/201817:00
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IR-Passfilter
Das IR-Passfilter wurde zur Ablichtung des Mondes eingesetzt und erfüllte alle Erwartungen hinsichtlich Beruhigung des Bildes.
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Ralph
237/08/2018
26/08/201822:18
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Seeing Through the Martian Dust
The Baader 685 nm filter has a well-deserved reputation for mitigating the effects of poor seeing when doing Lunar imaging. This year (2018) it proved its worth by permitting the imaging of Martian surface features, despite the veil of dust raised by the planet-wide storm. The 685 nm images stand alone or can be used, in combination with the very uninformative visible light views of the planet, to create interesting color images that mimic much of the detail of normal RGB images in the absence of the atmospheric dus (see attached image composite). The benefits of this filter can be realized with instruments of modest aperture.
It saved the 2018 Mars apparition from absolute disaster.
Nothing
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Marcel Drechsler
311/11/2017
08/11/201703:50
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Verwendung des Baader IR-Passfilters im Deep Sky B
Die Wellenlängen jenseits der 700nm sind nicht nur für die Planetenfotografie interessant, sondern bieten auch dem Deep Sky Fotografen spannende Möglichkeiten und neue Einblicke in die „Paradeobjekte“ am Nachthimmel.
Mit der neuen Generation von (Mono-) Amateurkameras, die bis 1100nm empfindlich sind ist es möglich den nahen Infrarotbereich (NIR) abzulichten, um so bislang verborgende Details in Wasserstoff- oder Molekülwolken zu entdecken. Der berühmte Pferdekopfnebel beginnt im NIR leicht transparent zu werden und gibt den Blick auf in ihm enthaltene Sterne frei, der Orionnebel entblößt Cluster junger Sterne und selbst in Dunkelnebeln kann man Geburtsstätten von Sternen sehen.
Meine Empfehlung für die Verwendung des Baader IR-Passfilters im Deep Sky Bereich:
Kombinieren sie die NIR-Daten in der Bildbearbeitung mit anderen Wellenlängen des Lichtspektrums.
Zum Beispiel NIR mit einem Schmalband H-alpha-Filter oder zusätzlich noch Grün und Blau.
Tipp:
Nach meiner Erfahrung neigen Sterne im IR-Bereich stark dazu, sich aufzublähen. Daher ist es ratsam mit kurzen, aber zahlreichen Einzelframes zu arbeiten, um zu verhindern, dass zu dicke Sterne das Bild verderben.
Pros in der Deep Sky Fotografie
- bis zu zehnmal mehr sichtbare Sterne
- Nebelstrukturen werden leicht transparent
- Luftunruhe und schlechtes Seeing fällt nicht so stark ins Gewicht
Cons in der Deep Sky Fotografie
- weniger scharfe Details
- relativ lange Gesamtbelichtungszeit (etwa analog Schmalband OIII)
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W. Paech
191/07/2016
10/07/201603:23
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IR-Pass Filtervergleich Planetenfotografie
Sehr geehrtes Baader Team,
Es ist schon lange kein Geheimnis mehr, dass sich die Seeingbedingungen im spektralen nahen Infrarotbereich gegenüber dem blauen und grünen Licht in vielen Fällen deutlich verbessern lässt.
Ich habe mich schon lange gefragt, ob es sinnvoll sein könne, Filter einzusetzen, die erst jenseits der 685nm des BAADER Filters öffnen, um die Seeingbedingungen während der Aufnahme von Rohavifiles weiter zu verbessern.
Im Juli und August 2016 habe ich an insgesamt 10 Abenden zu verschiedenen Mondphasen und Uhrzeiten Rohavifiles im direkten Vergleich mit drei Filtern (BAADER 685, Astronomik 742- und 897nm) aufgenommen.
FAZIT: Aus meiner Sicht gibt es nach diesem ausführlichen Test keinen Grund Mondauf-nahmen in tieferes IR zu verlegen. Eine weitere Seeingberuhigung wird nicht sichtbar. Das BAADER IRPass Filter ist in meinen Augen ein optimaler Kompromiss zwischen Seeinge-beruhigung und Belichtungszeit.
Den gesamten Bericht und Testbilder in hoher Auflösung habe ich Baader Planetarium zukommen lassen
Herr Paech hat bereits viele Produkte von uns getestet und unter anderem über den IR-Pass Filter schon einige Erfahrungsberichte geschrieben. Sie finden diese unter dem Tab "Weitere Informationen".
Den hier erwähnten ausführlichen IR-Pass Filtervergleich haben wir ebenfalls in unseren Blog mit aufgenommen, siehe hier:
... a couple of days ago I bought a couple of Baader color filters. I had the opportunity to shoot the planet Saturn under a very good seeing and to make some pictures of it through our Baader filters : the new IR 685nm, the RG 610nm, the Blue 470nm and the IR-cut. I'm glad to inform you that I'm very happy with your filters because the images through them are absolutely great. I could obtain very good results with my beloved orange Celestron 14. I plan to buy other filters from you because of their good quality. Herebelow are the Saturn pictures I took ast week through your filters. Feel free to use them at your convenience.