BD wrote
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Ummm, yep. That all made sense. To someone anyway, but not to me
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Nice work Ken, you're learning fast. The dark frame thing is simple, it's merely an image taken with the cap on, for the same exposure time as you're using. That frame will simply be black, but any noise (dots) that are generated by the camera pixels will still be there. By subtracting that dark frame the software will know which pixels are real info and which are noise or hot pixels and can remove them....
