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I have a question regarding bias frames which is not a criticism or a
disagreement with anyone[I know far too little to presume to do either.]
I have a number of books on various types of astrophotography; all
written or updated fairly recently. All written by acknowledged experts
in the field. All state categorically that bias frames are totally unnecessary unless using unmatched darks, especially as darks contain bias information. If this is true, why do some members push us novices to use them? I thought that this topic related to this thread, so was not really hijacking it.
raymo
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