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Astroimaging_filters · Astroimaging Filters
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Group Information

  • Members: 396
  • Category: Astrophotography
  • Founded: Jul 21, 2002
  • Language: English
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Description

This group is dedicated to the discussion of imaging filters including RGB, CMY, and Narrow band filters such as Ha, Sulfur, OIII ect. Please feel free to discuss these, offering advice and examples of images taken with various filter types for the benefit of all.

This stunning image of NCG281 is the product of 30 hours of imaging by Russ using a 20" f8 Ritchey. He mapped SII, Ha, and OIII as RGB and additionally Ha as luminence.

Image Credit: Russell Croman


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Re: Exposure Ratios
I'm new but I don't see anyone else jumping in here so I'll give it my best. If anyone can make my answers better or if anyone sees an error, please jump
Posted - Thu Apr 23, 2009 5:12 am
 greeps3
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Re: Exposure Ratios
... Kevin I believe there's software that will do the calculations for you. You can image a G2V star then use the software to calculate the proper ratio. I
Posted - Thu Apr 23, 2009 5:12 am
 greeps3
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Exposure Ratios
Filter guru's. I was hoping for your help and a bit of a shortcut. I have been doing mostly visual observing for some time now, or planetary imaging with my
Posted - Thu Apr 23, 2009 3:18 am
 Kevin
kevinbm13
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Exoplanets??
Hi, I was looking at the AVA website today and noticed New Product number 7, SLOAN filters that have a utility in studying exoplanets, see:
Posted - Sun Apr 19, 2009 10:43 pm
 ssb73q
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Re: Methane Filter
Hi Richard, that's what I figured. By the way there is an interesting comparison on the 40D and 50d at: http://www.astrosurf.com/~buil/50d/test.htm Christian
Posted - Sat Jan 31, 2009 6:06 pm
 dieterkuespert
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2008 80 77 13 58 34 4 1 5 1 2 28
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