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I’d suggest that a combination of seeing and optical quality trump the move from 8” to 10”.
In saying that, my decision to get the Mewlon 250 over the M210 was purely a mechanical decision. Given that the M210 is HALF the weight of the M250 I do sometimes think it would be nicer but I love the non-moving primary and the addition of the built in corrector and the better secondary collimation design.
If both the 8” & 10” CC are of similar optical quality (you won’t know unless you compare them side by side) then the 10” will punch a bit more. A better optically 8” will beat an inferior 10” under the same seeing.
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