My own experience with an x5 PowerMate is that I have only been able to use it for imaging reasonably bright double stars with my C9.25 F10, Mewlon 180 F12 and Vixen ED102 F9 refractor.
On planets or the Moon, the image just breaks down at F50, F60 and F45 respectively. I think that for my ‘scopes, an x3.5 PowerMate would be ideal for those nights of excellent, steady seeing.
Cheers
Dennis
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