Baader H-alpha Narrowband-Filters (6.5nm) – CMOS-optimized

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Baader H-alpha Narrowband-Filters (6.5nm) – CMOS-optimized

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€ 139.00 Price excl. German VAT tax (19%): € 116.81

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Which side should face the telescope?
  • Baader H-alpha Narrowband Filter – Precision Grade
  • 6.5 nm FWHM, recommended for optical systems from > f/3.4
  • 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

We explicitly warn against observing the sun with a DeepSky 6.5 nm (equivalent to 65 Ångstroem) H-alpha narrowband filter, specialized solar chromosphere and prominence filters from SolarSpectrum start at 0.8 Ångstroem. Photographic experiments with a camera are theoretically possible, but by no means observe the sun with naked eyes – you endanger your eyesight!

Baader Narrowband-/Highspeed Filter Selector

To make it easy for you in the future to decide which kind of Highspeed (or Narrowband) filter you need for your telescope, please check our Filter-Selector, that provides you the correct individual graph based on your entriest, in which you can find the perfect filter for your telescope by f/ration and central obstruction.

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€ 139.00 Price excl. German VAT tax (19%): € 116.81

Product Questions and Answers

Do you have a question about this product? Then we would like to ask you to first look through the existing questions and answers, most likely your question has already been answered and you will get the desired information much faster this way. Your question is not listed? Then please click on the button "Ask a question".

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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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Please what is the material of the filter? Plastic, Glass etc..
Question by: Rastislav on Nov 21, 2022 4:47:00 AM | 1 Answer(s)

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For visual solar observations, could a H-alpha narrowband filter be used safely with a 4.5" refractor fitted with a Herschel wedge (white light solar observing)?
Question by: H E Palmer on Oct 25, 2023 12:04:00 AM | 1 Answer(s)

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Is the filter H-alpha 1¼" Narrowband-Filter (6.5nm) CMOS optimized (ref. 2961100) suitable equal with CMOS cameras Monocrome and Color? Thanks.
Question by: Enric Sánchez on Nov 1, 2023 10:05:00 AM | 1 Answer(s)

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I own a Canon 6D Mark II that does not have an H-alpha clip because the mirror is too close to the body. So, can I stack a Baader H-alpha filter to my 2 inch Baader Neodymium IR Cut Skyglow filter as an alternate solution effectively? If not, what else could I do?
Question by: Dale Shunk on Feb 16, 2023 6:55:00 PM | 1 Answer(s)

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This new generation of Baader CMOS-filters features:

CMOS-optimized Baader Filters
  • Increased contrast
  • Ever more narrow passbands
  • Reflex-Blocker coatings, for largest ever freedom from halos, even under most adverse conditions concerning aux-optics
  • FWHM on each filter category carefully designed to allow for 1:1:1 exposures, matched for typical CMOS quantum efficiency and s/n ratio
  • 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 black frontside 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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