Quote:
Originally Posted by gregbradley
I do find though you get more reliable flat fielding if you do either a bias subtract on the master flat at the time of calibration or a flat dark subtract. I do both. On some systems or in light polluted imaging conditions flat fielding is a bit of an art and it can make a huge difference.
Greg.
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Yes, I agree Greg. I was only referring to light frames, I forgot to mention Flat frames
