I posted a thread asking about this, but didn't get much response. I found out its called digiscoping by looking around the net. Found this site called Tines Up, they sell a cannon point and shoot camera with an adapter mounted to it that slips right over the eyepiece of the spotting scope(many scope types available). They have cool video on their site of the setup in action and I needed a new point and shoot cam anyhow so I bought the thing. Got a video of a bull destroying a tree at 260yards last weekend(after I bugelled at him:). Can't get the video to load on here (have to work on that). I have only had it a couple weeks, but 2 thumbs up from me. The video was shaky and long distance pictures can be also, so I get focused in and set my timer....worked good. A guy could probably make his own easy enough, but I didn't have the time. My picture is over 300 yards out, cannon power shot elph 100, Ziess 15-45 spotting scope, first time using the camera on the scope, so the picture quality could be better, but daddy like anyhow. Gonna get me some real cool Pics/Video with this thing.
Check out the settup and the videos from the place I bought my camera.
www.tinesup.com