Baader Ultra Narrowband O-III CCD-Filter (4,5nm)

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Baader Ultra Narrowband O-III CCD-Filter (4,5nm)

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€ 238.00 Price excl. German VAT tax (19%): € 200.00

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  • Premium grade O-III CCD-filter for fast optical systems f/8 to f/3
  • IR-blocked
  • NO halos, NO reflections, NO ghosting
  • non-ageing sealed coating edges

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€ 238.00 Price excl. German VAT tax (19%): € 200.00

Product Questions

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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"?
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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?
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Question by: Anders G. on Sep 20, 2017 12:55:00 PM | 1 Answer(s)
A few days ago I acquired an OIII filter 4.5 nm 31mm and after trying it the halos it generates are horrible.
Why does this happen if the specifications ensure that they do NOT produce halos?
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Question by: Jesus Magdalena on Aug 9, 2019 12:22:00 PM | 2 Answer(s)
I am considering buying a 2 inch 4.5nm OIII filter for use with my modified Canon 70d and Redcat 51. I’ve read that the Baader filters can create halos around stars, possibly caused by the optical train configuration. Are the halos that are reported manageable in post processing? Have you had any feedback from customers with similar set ups to myself and if so, what was the general opinion? The sole reason for buying it would be to create HaOiiiRGB composite images with the current set up that I have. Any feedback regarding this filter would be welcome.
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Question by: Kevin Bell on Feb 8, 2021 8:07:00 PM | 1 Answer(s)
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