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I think Mak Newts can be pretty well corrected for coma over a reasonable size field, but yes I don't see the fascination when you can by an equivelent Newt tube assembly for about 1/4 the price and just add an MpCC. I think the thermal issues of having that big hunk of glass in the BK7 menisuc corrector up front are not trivial too.
All that being said there is something appealing about a scope that has all spherical surfaces and no spider vanes.
Mark
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