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Looking at my setup again, my distance is 105mm, which is the distance some say the 6.3 reducer was designed for. Others calculate it out as 85-87mm.
I can't help but wonder if the claim it was designed for 105mm stemmed from the fact that the #62 adapter conveniently gave that distance. The math does seem to more strongly support the 85mm number, which would require a 2cm shorter adapter, which Meade does not make.
In the end I doubt that it is absolutely critical.
Meade obscures this further by stating on their own web pages that the "optimal focus position 45mm". WTH?
I'd be interested to see a series of shots done at varying distances to see how it impacts edge sharpness, but this is more likely to be a resolvable issue with the newer designs than the classic SCT anyway.
Regards,
Eric
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