[peter_4059 (Peter)]

Tony,

You need to replace the finderscope eye-piece with an adaptor that will accept the nosepiece of your guide camera. Depending on the type of finder you can usually unscrew the entire eye-piece end of the finder. This typically leaves around a 2" diameter thread. You then need something that will fit back into that thread with an 1 1/4" hole in it and locking screw for the finder. A possible place to start is to get a 2"-1 1/4" adaptor (like the one in a typical 2" focuser). I have made them out of a stick of aluminium on the lathe also.

You also need to ascertain the position the guide camera comes to focus in the finder.

Good luck

Peter