I now remember what I wanted to do and here is a link:Harold Gough wrote:[quote="dmillard]I adapted the Olympus Telescopic Extension with a Nikon mount on the rear.
I like the way you mention this almost as if it were any everyday task.
I can't remember the circumstances in which I considered the possibility of doing this to some lens or other. I have no engineering ability or tools so I would be reliant upon being able to swap baseplates and using the same screw holes. How close is this to being realistic? Are there any helpful weblinks?