Quote:
Originally Posted by RickS
Flats also correct for vignetting and variation in sensitivity between pixels (which causes fixed pattern noise.) I doubt that you'll find many folks producing high quality astro images that don't do flat-field correction.
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Yeah thanks for jumping on that, but I am simply not obsessive about it. I grant you that vignetting is a good reason but my equipment doesn't have any, nor do I have any fixed pattern noise in my images.
I guess I need to learn to keep my mouth shut and let the experts answer any question.