[John K]

Originally Posted by Dennis

Might be worth checking the size of the FOV of the F14 Mak Cass, as ideally you would like a nice, wide FOV to choose a suitable guide star, without the need to fiddle with the rings that hold the guide scope.

I personally would avoid any guide scope that has a moveable mirror, as potentially it is another source of flexure in the overall system.

Cheers

Dennis

Thanks Dennis, great advice, and getting realy concerned about the mirror shift issue!