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If your dark frames are the same duration as your light frames, my understanding is you do not need to take bias frames, as when you subtract the dark from your light frame, of the same duration, the bias is subtracted with the dark (its in the dark frame).
However, if you chose to have your dark frames longer than your light frames, you will need to do adaptive dark subtraction, in which case you will need to subtract the bias first, then your dark frames are scaled.
Josh
Last edited by Joshua Bunn; 24-08-2016 at 09:22 PM.
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