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OAG leave guide scopes in the dust.
The problem with guide scopes is differential flexure. OAG don't suffer from that.
780mm is relatively short focal length but tracking errors will get exaggerated by the small CMOS pixels which are harsh on these sorts of error.
Will you get away with it? In a smallish final image it will be hard to notice but any close up look will show the non round stars in 5-10 minute exposures.
Greg.
Last edited by gregbradley; 03-06-2022 at 09:00 PM.
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