Quote Originally Posted by Dan Fromm View Post
Drew, if the current C-90 is the astigmatic dog that the two (one purchased, the other a warranty replacement) I've had were, it won't do at all for astrophotography.

To be fair to Celestron, I got dog 1 in 1978 and dog 2 in 1983 after I realized that there was a warranty. The current one may be an improved design. The ones I had are the worst and next-to-worst lenses I've ever tried to use.
Most new scopes are pretty good. Can always get a telecompressor or coma corrector to fix issues at the edges.

Refractors are better and RC scopes as good and better.