Open the back of the camera, and remove the 4 small screws around the lens
that attach the bellows to the front of the camera. Then, remove the screw on
the front of the camera that attaches the lens assembly to the frame. Then it
can be swung out to allow access to the back; Remove all the screws on the back of the lens assembly, then pry off the thin metal plate on the top of the lens assembly.