the plastic ring around the lens, and discard it. Unscrew the lens, and set it
aside (this will be made into the lens cap). Cover the small semicircular slot next to the lens with a piece of electrical tape, to prevent light leaks.
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.
to see what is needed).