Summary

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
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Instructions

You 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 :-

Increased the depth by 5mm for increased clearance.
Changed the shape of one of the holes to a key type shape, so that the cable grommet from the original camera cable can be attached.

SPC900NC Webcam Telescope Adaptor