Baader H-alpha 35nm CCD Filter

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Baader H-alpha 35nm CCD Filter

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€ 83.00 Price excl. German VAT tax (19%): € 69.75

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  • Premium grade H-alpha interline chip CCD-filter for fast optical systems f/10 to f/2.8
  • IR-blocked
  • NO halos, NO reflections, NO ghosting
  • non-ageing sealed coating edges

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€ 83.00 Price excl. German VAT tax (19%): € 69.75

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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176
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

38
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
Question by: massimo nardoni on Oct 13, 2016 5:19:00 PM | 1 Answer(s)

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17
In one of you articles you said this filter can be used as ERF in front of an Ha prominence filter such as the Daystar Quark. I would like to know if this is possible for a refractor with f/8 focal ratio or F/5.6?
Question by: Peter Fassler on Dec 17, 2021 3:56:00 AM | 1 Answer(s)

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9
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.
Question by: Andrew Huskinson on Nov 9, 2017 2:22:00 PM | 1 Answer(s)

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4
What is the transmission % of this filter at the SII emission line (671.6nm)? Since the HBW of this filter is 35nm, the resulting light should also contain the SII emission line if I am calculating it correctly...Am I right?
Question by: Petr Cizek on Aug 31, 2022 10:33:00 PM | 1 Answer(s)

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3
I live in a polluted area and I own a 2’’ Baader 35nm H-alpha (f10 to f2.8) and I’d like to put my filter in front of my 20mm f1.8 lens attached to a Full Frame camera. I have a 35mm 1.8 too.
Obviously the filter will cause a heavy vignette (ok for me), but I need to know how much the filter efficiency changes according to the angle of incidence of the light because I’m using a wide-angle lens (for example wider window band and/or shift). Is there a more appropriate filter to use in front of the lens?
Question by: Davide Conticelli on Jan 28, 2022 9:52:00 AM | 1 Answer(s)

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3
Is this filter UV blocked?
Question by: Derek on Aug 25, 2021 4:09:00 AM | 1 Answer(s)

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0
Hi, Astrograph use these filters as internal ERFs in solar telescopes, tested in refractors up to 152mm. I have been using a 1.25" version in a Vixen 110mm VMC with no issues. I am considering using a 2" in a 180mm Mak. Is there a specification for the watts per square cm on the filter and a specification for the maximum working temperature? I calculate there would be 26W incident on the filter spread across it, with 1.3W transmitted. Andrew.
Question by: Andrew Huskinson on May 18, 2019 12:11:00 PM | 1 Answer(s)

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-1
What is the thickness of the 1.25" H-alpha filter cell including the depth of the thread? Thank you.
Question by: Tim Haymes on Mar 19, 2017 11:14:00 PM | 1 Answer(s)

Rating of Question

-9
Hi, can I use this H-alpha 35nm filter with your solar film to get images of the chromosphere, prominences, filaments etc on the Sun? I would be imaging with a dslr. Thanks.
Question by: Simon Johnson on May 6, 2019 5:13:00 PM | 1 Answer(s)

Rating of Question

-9
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