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I had a Skywatcher 6" Mak-Cass and now have a C6 SCT. The Mak may have been slightly sharper and had a touch more contrast but the C6 is very good. On deep sky the C6 is brighter, perhaps due to having Celestron's best coatings.
One of the issues with OLDER Skywatcher Mak-Cass scopes is the primary mirror is undersized for the corrector, meaning that the effective aperture is more like 140mm. The latest models have oversized primary mirrors to correct this issue.
SCTs are also lighter than a Mak of the same aperture. A 6" Mak weighs about the same as a C8.
Both scopes have some thermal issues in winter but not nearly as bad as a C8 I once borrowed.
Last edited by MortonH; 13-05-2016 at 12:58 PM.
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