Quote:
Originally Posted by marki
Thats interesting Marc, I only ever use bias frames when building a master dark. Have never tried it on the flats, will have to give it a go. Perhaps what you are doing is similar to what I do with dark flats??? I take a series of light flats and a series of dark flats then combine to make a master flat.
Mark
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Yes it's the same thing because your dark already contains the bias needed to scale the flat prior to divide. If your bias subtract your flats prior to stacking them then you don't need to do that.