I have had fairly good success digiscoping with a Kowa TSN-2 scope with 20-60x zoom and a Nikon Coolpix 2100 (2mp) and 4600 (4mp). I made an adapter to fit between the two. It is a piece of plastic that is 1-1/2" diameter and 3/8" thick with a 7/8" hole in the middle. The outer diameter, 1-1/2", fits in the rubber eye cup of the scope and the extended lens of the camera fits in the 7/8" hole. The adapter keeps the camera in the center of scope eyepiece and steadies it. I find that I have to zoom the camera to the max of 3x to avoid vignetteing. I usually have the scope at 20x, but sometimes go to 30x. If anyone is interested I could send them photos of the adapter and what I used to make it.

Hugh Jennings
hughbirder at earthlink.net
Bellevue, WA