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Galaxy AP, minimum FL required?
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01-09-2017, 10:11 AM
Atmos
(Colin)
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Join Date: Aug 2011
Location: Melbourne
Posts: 6,984
It's more to do with image scale than focal length. For your camera something around the 1000mm range would be good. So a 8" F/5 or 10" F/4 or 12" F/3
http://www.astrobin.com/full/287438/D/
This was shot at 677mm on a night of awful seeing.
Atmos
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