[rogerg (Roger)]

Originally Posted by MortonH

How about a 150mm f/12 Maksutov-Cassegrain? Focal length is 1800 so image scale might be about right. My Skywatcher Black Diamond is very good for visual on the Moon. Haven't tried it for photography yet.

The focal length is about right. I wonder how the flatness of field fairs. Worth consideration.

Originally Posted by DavidU

Hi Roger, I may get rubbished for this but I had great success with my 150mm,f/8 Achro, with a little fiddling with minimizing spherical aberration I got some great results with my $500 (second hand scope).
http://www.iceinspace.com.au/forum/s...highlight=LUNA

Yes I wouldn't be surprised if a relatively cheap Achro would do the job. 150mm is quite a beast! Probably too big for me. I'd be interested in seeing your shot at 100% and an image before processing.