Quote:
Originally Posted by nebulosity.
I have never used bias frames, I thought that bias is in the darks and would be removed along with the dark subtraction.
If you subtract a dark and a bias, wouldn't that subtract the bias twice? (assuming that bias is in the darks) Which would then add in noise?
Jo
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That's my understanding. I wouldn't use both unless I'd already subtracted the bias from the dark (like you would if you were scaling your dark frames).