This is an adapter that lets you attach the popular Philips SPC900NC circuit board to a 1.25" telescope eye-piece opening. http://www.gyrobot.co.uk http://www.facebook.com/gyrobotukYou might want to print the adaptor with support unless you are confident you can bridge the roof. Underneath (inside) the adaptor there is the CCD chamber which replicates the original black one screwed to the circuit board. Remove the original and replace with my adaptor. Ideal tutorial for taking apart the webcam + contains details of the long exposure mod here :- http://home.zonnet.nl/m.m.j.meijer/D_I_Y/spc900nc.htm EDIT : Uploaded a new base with two modifications :-