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Old 25-01-2010, 09:29 AM
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Satchmo
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Join Date: Dec 2005
Location: Sydney
Posts: 1,883
The RC is a `coma free' design. Any Newtonian user would use a low cost coma -corrector ( ie Baader) if they were doing photography, so comparison with a Newt without a coma-corrector is not really saying anything much. BOth designs are equally sharp on axis , provided the optica are made to spec.
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