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Sorry you can I've just found this
CAMERA FOCUSING. Astrophotographers want their lenses focused at infinity, but newer autofocus lenses can go past infinity when focused by hand. To resolve this problem, set the lens at infinity during the day and then lock it there with one or two wraps of tape around the barrel. Use tape that won’t leave a residue (no duct tape). Manual focus lenses don’t have this problem, but some astrophotographers tape them anyway. It’s one less thing that can go wrong
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