For installation, the original lens is bonded to a double-sided tape.
Because it seemed to me daring the application of an adhesive, I used double-sided carpet tape, holds perfectly so far.
These pull a small piece protective film, cut and glue on the adhesive side of the carpet tape, so as to obtain a piece of tape with foil on both sides.
Punching Now with a commercially available punch a hole in the tape. Then place the center now developed original lens and cut the edge around the lens.
This gives an adhesive ring that is roughly equivalent to the original tape ring.
Now the protective film from one side pull glue (with Cutter for example), and the tape in the lens opening on the rear panel. Pull Now the other protective film and glue the lens.
The only drawback: The carpet tape is typically white and now you can see this white ring through the camera lens ... well for that I did not have to be handled with liquid adhesive
