Baader UV/IR-Cut / L-Filter – CMOS-optimized

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Baader UV/IR-Cut / L-Filter – CMOS-optimized

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€ 65.00 Price excl. German VAT tax (19%): € 54.62

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Which side should face the telescope?
  • Baader CMOS UV/IR-Cut (420 – 685 nm) Bandpass Filter, suitable from f/15 to f/1.8
  • Reflects harmful thermal radiation in the infrared spectral range
  • Provides 98% transmission over the entire visible spectrum from 420 - 685 nm
  • Prevents blurred star imaging with red-sensitive digital and CCD/CMOS cameras
  • Reflex-Blocker™ hard coated and planeoptically polished – with sealed coating edges (Life-Coat™)
  • Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim
  • Optimized for modern CMOS cameras, but likewise excellent for CCD camera technologies

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€ 65.00 Price excl. German VAT tax (19%): € 54.62

Product Questions and Answers

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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)

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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)

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Is Baader UV/IR-Cut / L-Filter – CMOS-optimized suitable for solar observation as extra safety combined with Baader Astrosolar film ?
Question by: Vk on Feb 4, 2022 3:51:00 PM | 1 Answer(s)

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what is the optical thickness of the 2in mounted filter. i have seen 2mm optical thickness on one web site and 2mm physical thickness on another. want to know the impact on back focus length calculations. thank you.
Question by: Lee on Feb 24, 2023 4:25:00 AM | 1 Answer(s)

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Can I use this filter in an original William Optics Redact 51 holder?
Question by: Stefaan on Dec 3, 2023 6:24:00 PM | 1 Answer(s)

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The filter says it’s suitable from f/15 to f/1.8. What would be the result if I’m imaging outside this range e.g. f/18?

The optimal f ratio for imaging planets with my camera is f/15 (5x the 2.9 micron pixel size) but am having a bit of trouble reaching this (f/17-f/18 has been the closest). So, wanted to know what the impact would be to image quality etc. if I used this filter with at f/18.
Question by: Chris on Dec 13, 2021 4:04:00 PM | 1 Answer(s)

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What is the actual dimensions of your 65mm x 65mm filters, for instance, the Baader RGB R-Filter 65x65mm – CMOS-optimized
Question by: R. Paulson on Jan 31, 2024 6:24:00 AM | 1 Answer(s)

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For imaging Nebula, your UHC-L / Ultra-L-Booster-Filt seems clear. But for Galaxies, I am a bit confused. Which is best for Galaxies: Baader UV/IR Cut CMOS L or Baader Neodyium & IR Cut filter?
Question by: Richard on May 6, 2023 1:30:00 AM | 1 Answer(s)

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I have the 1.25" mounted version of the UV/I-Cut filter. It has threads on both sides. What is the correct orientation of the filter when mounting on to the camera? Which side is facing the telescope and which side is facing the camera sensor?
Question by: Daniel on Jan 15, 2024 12:46:00 PM | 1 Answer(s)

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I use the Celestron C14 edge with reducer with an earlier generation Baader UV/IR cut filter. Even with careful calibration I get the effect of a port hole in the images where the reducer apears to create this. Will the new filter help with this issue as I feel it may be an internal reflection not being well handled by the earlier generation filters. I also see this effect with the RGB filters.
Question by: MARK Shelton on May 25, 2022 1:46:00 PM | 1 Answer(s)

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I would like to mount this filter on a 52 mm lens. What filter size would you recommend? And would I need a specific holder to screw the filter in the lens?
Question by: Silvia on Apr 14, 2022 11:48:00 PM | 1 Answer(s)

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100x100: I need to mount a much larger UV-or IR-filter onto my DSLR-lens than your regular astro 2" filters allow
Question by: FAQ - Team Baader on Nov 25, 2022 8:54:00 AM | 1 Answer(s)

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This new generation of Baader CMOS-filters features:

CMOS-optimized Baader Filters
  • Increased contrast, matched for typical CMOS quantum efficiency and s/n ratio
  • Reflex-Blocker coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics
  • Identical filter thickness to existing standards, with utmost care for parfocality
  • Blackened edges all around, with filter-lead-side-indicator in the form of a telescope-sided black outer rim, to additionally eliminate any reflection due to light falling onto the edge of a filter
  • Each filter coated individually, with sealed coating edge (NOT cut out of a larger plate with coatings left exposed, read more)
  • Life-Coat™: evermore hard coatings to enable a non-aging coating for life – even in a most adverse environment

  • Further information, test reviews, image results...

    Don´t be misled.

    These all new CMOS-optimized filters work magnificently with all existing digital camera technologies, be it CMOS or CCD. However – an owner of CCD-camera-technology will still find our previous, extremely affordable, narrowband filter technology to be fully apt for excellent imaging. But: "the Better always is enemy to the Good".

    ... can be found on our detailed Blogpost:

    Baader Blogpost:
    Baader CMOS Optimized Filters: Unleashing the Full Potential of Astrophotography

    Baader Blogpost:
    New CMOS-optimized Baader Filters

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    2 Item(s)

    Sandrino Marinescu 304/11/2023 01/11/202316:56
    • Rating:
    Beautifully engineered filters to use in
    The long story short goes like this: we needed an UV cut filter with a cut-off wavelength in range of 400-420nm. The issue was we needed the filter at an "impossible" size, of precisely 5.6mm diameter. Luckily for us, the 39mm diameter, 0.55mm thick UV/IR cut filter from Baader was thin enough so we could cut it ourselves to measure. Although we do not encourage anybody to cut /shape the filters themselves (it's tedious, highly time-consuming process) the end result was a precise 5.6mm UV cut filter that we could finally mount in our UV fluorescence photography setup. The filter itself performs flawlessly to its purpose but that is quite expected when it comes to Baader filters, right?

    The results:
    Attached is an animated GIF. The first shot of a 1000x150 mm rock sample is taken in visible light, the second one in UV light with Baader UV/IR Cut Filter. On the sample there are 3 veins saturated with crude oil. In visible light, those crude oil veins appears dark brown (surrounded by the light grey rock background). In UV fluorescence, the crude oil appears yellowish - brown (while the rest of the rock sample appears deep blue), that is the classic oil UV fluorescence signature. The scans are not actually a single picture, but they were obtained by stitching together slices representing about 5mm of sample (about 200 pictures stitched together to cover the entire 1m length of the sample - our setup does this automatically, virtually in real-time).
    The third frame of the GIF is a detail picture (mostly purple) that shows how that UV picture would look like WITHOUT Baader UV cut filter. As we can see, the faint fluorescence light we’ve seen in the UV scan is overpowered by the reflected 365nm UV excitation light so a UV cut filter to eliminate the reflected excitation light is critical.

    Thank you, Baader Planetarium for bringing quality products to the market!

    P.S.: Attached is also a detail snapshot of the camera setup. The actual camera is the one surrounded by 4 LED (those 4 LEDs are for taking pictures in visible light) while next to the camera there is a black disk made out of ZWB2 (365nm filter) that covers the UV light source (a Nichia 365nm high power UV LED). The overall setup details are available here:
    • It was exactly what we needed, when we needed. Thank you, Baader Planetarium!
    • There is nothing to dislike. The filter does precisely what it was meant to.
    Many thanks for the kind review! We would like to add, that the mention 39mm diameter (0,55mm thick) UV/IR Cut filter was already also a custom production for a research project and is not for sale regularly. We're glad that you were able to modify it further to fit your needs.
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    Wolfgang Dz 316/11/2021 13/11/202118:43
    • Rating:
    Macht was er soll
    Ein Filter, der tut was er soll. Er leistet seinen Beitrag zu scharfen Sternabbildungen oder detailreichen Jupiterfotos. Ich möchte ihn nicht missen.
    • tu was er soll
    • -
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