Quote:
Originally Posted by Paul Haese
That is my understanding too. I usually image for each colour until I can see the central dust motes for that colour; this also shows vignetting really well. It varies quite a lot really for each filter with exposure. I suppose I should use a numbers relationship but I go by what I can see in the flat image. This usually gives me a good flat to subtract away from the subs.
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Hi Paul, are you using a monochrome camera?