Quote:
Originally Posted by peeb61
Thanks Marc, The flats were captured at -15deg and duration was 0.13 sec, does this sound right?
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Yes that's fine. So now shoot some darks at -15c and 0.13s duration. Do 100 of them. Stack them and call it master bias.
If you're familiar with pixel/file maths. Get your master flat and subtract the master bias you've just done then save it as new master flat. Use that one to do your flat fielding and you'll have a nice even background with no dust motes or color gradients.