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camera lens SIZE vs refractor
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11-11-2020, 11:25 AM
Camelopardalis
(Dunk)
Drifting from the pole
Join Date: Feb 2013
Location: Brisbane
Posts: 5,429
And of course, all this is before you stop the lens down... few (any?) lenses are perfect, so there's a good chance it needs stopping down, thus reducing the aperture and potentially introducing diffraction artifacts from the aperture blades.
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