|
I guess I'm off on a bit of a tangent. I'm more getting at a scope that wont come to focus. You need to know your real f/l (vs what may be written on the tube of the scope etc) to see if you're in the ballpark - or which way you need to start adjusting things.
I had similar problems with my second dob a long time back and ended up having to move the primary cell back by about 1/4".
Dean
|