Baader 6.5nm f/2 Highspeed Filter-Set – CMOS-optimized (H-alpha / O-III / S-II)

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Baader 6.5nm f/2 Highspeed Filter-Set – CMOS-optimized (H-alpha / O-III / S-II)

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€ 419.00 Price excl. German VAT tax (19%): € 352.10

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  • Baader H-alpha / O-III / S-II f/2 Highspeed Filter Set – Precision Grade
  • 6.5 nm FWHM, recommended for extremely fast optical systems from f/3.4 and faster
  • Specially designed for the special filter requirements when used with extremely fast f/2 optics like the Celestron RASA astrographs
  • 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

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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€ 419.00 Price excl. German VAT tax (19%): € 352.10

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)

Rating of Question

172
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

39
Since these filters are optimized for fast systems, will they work as well as the "normal" filters on say an f/6 system that I have now? It would be nice to use these fast filters on the current system as well as a faster system in the future.
Question by: Randy Cross on Jan 20, 2022 11:09:00 PM | 1 Answer(s)

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2
Description

Details



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:
    New CMOS-optimized Baader Filters



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    Remco 355/12/2021 22/12/202114:27
    • Rating:
    SHO recording under full moon
    This image was recorded over two nights under the full moon and the nightafter full moon, with my new SHO 6,5nm filters. I am very pleased at the signal it gave.

    recorded with a a Skywatcher 150/750 newton and QHY 294M camera
    Ha: 43 x 6 minutes
    Sii: 37 x 6 minutes
    Oiii: 27 x 6 minutes

    There was a slight halo around the brightest stars in O-iii. However that was manageble in postprocessing. A cut out of the raw O-iii image with the moste severe halo in the images is attached below (star in the center bottom of the overall image).
    • Very good signal, even under a full moon
    • There was a slight halo around the brightest stars in O-iii. However that was manageble in postprocessing.
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