Even doing darks when I'm out taking shots isn't a problem. I just need to set the camera to do its thing while I'm packing everything else up. But yeah, I'll do some later and apply those to the data I've got.
Flats seem a bit more complex, since I need a light box. The images definitely aren't "flat" though, since when heavily processing faint shots they come up darker around the edges. Could that be related to coma?
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