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How much coma in a 10" F4 Newtonian
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13-12-2018, 03:36 PM
Merlin66
(Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
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According to Rutten and Van Venrooij "Telescope optics" p 47 it would suggest for an f4 system that there will be noticeable coma beyond about 5mm off axis.
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