well since i am a complete newbie to digiscoping i don't know a lot, but i have learned a few tricks from some of the pages i've found on the subject. these are just suggestions but they seem to work so far...but for the most part it's trial and error.
1. use a camera with 3x optical zoom, this allows you to zoom in close enough to get rid of the black edges (vignetting). you don't need a huge lens, thats what the scope is for.
2. turn off digital zoom.
3. get a good camera adapter. for the price, about 50 bucks, the baader is the best overall choice imo.
I'm still learning as i go and will be glad to share what i learn. also if anyone else has any help to offer i would appreciate it. thanks!