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PS: What are bias frames? And how do I take/use those?
PPS: I think that if my polar alignment is okay, and then I'd like to go up to a longer focal length lens. Like I've ordered, and it's on the way, a nice 70-300mm zoom F4-5.6 APO lens. I believe that optically magnifying the subject (M31) will make a better difference than a whole lot of snazzy processing. But like while I'm at it: does someone here know how to do the median processing on Deepskystacker?
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