Started Apr 6, 2013 | Photos thread
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Contributing MemberPosts: 808
Re: M101
In reply to wfektar, Apr 10, 2013

Afaik the idea of dark flats is to remove noise from the flats; to make them truly flat, only depicting the optical train and nothing else. Please correct if I'm mistaken.
Here's an explanation for bias frames http://www.astro-imaging.com/Tutorial/Frames.html
I've only ever used dark frames, not bias or flat frames or dark flats. Just starting out with the astro stuff

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