Hi Matt,
as we both know the MN86 is a fine scope.
Without wanting to suggest Dennis isn't on the mark her (cos really he is), let me add that I currently lunar and planetary image with a newt of 1250mm focal length. I simply use a 5x Powermate, or sometimes eyepiece projection. I did this as well when I had the MN106. You will not find this an issue.
He is also right with the "in-focus" issues. These can be negated somewhat by careful focuser choice, and also (as I did with my MN76) careful adjustment of the secondary and primary. I was able to bring a DSLR to focus without any major structural changes.
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