Quote:
Originally Posted by Terry B
Dear All
Hagar kindly sent me the fit file to play with from his eta image above as an example from his QHY6 camera. There is very little dark noise with very few slightly hot pixels. The offset is about 700.
I am not anything like an expert in processing images and I have had lots of trouble getting a colour balance that is vaguely correct.
I have attached some attempts that I have had. I have found that to get close to white stars (using another image of eta that I have to pick which stars are reasonably white) I end up with a very green nebula. I tried playing with curves in Gimp and achieved the second image. It is better but still not anywhere near correct. Any suggestions?
If Hagar likes I can post the individual r, g, b, channels as binned and compressed files here. 4x binned (480k each) they end up the size of the second image but still useable for colour balance etc.
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Getting color balance really depends on which software you use. I have always hated Maxim for its Debayer tools, where as Astro Art does a better job. I remember having loads of issues with Maxim Debayer and my Canon 20D. In the end i downloaded a plugin to debayer color better.
Also i thnk you meant QHY-8 camera and QHY-6 in your comments.'
Theo