Normally I wouldn't bother with anything like the Crab nebula. The elevation from my observatory is never higher than about 30 degrees and it's right in the middle of the worst light pollution. A slightly gibbous moon wasn't going to help either. Anyway I still decided to have a go as an experiment. The result turned out better than expected so maybe I should venture north more often.
Cheers
Steve
http://members.pcug.org.au/~stevec/M...16200_RC14.htm