I have the following adapter, and I don't know what it is for, and I hope that one of you will. It is a novoflex, leihek. The male thread is 39mm, and screws into a Leica body. The female threads are 42mm. The approximate extension from the body would be approaximately 19mm. I wonder if this is to use a 42mm screw mount SLR lens on a Leica screw mount? Thanks
I think you will find it's an adapter to fit the Leitz 135mm Hektor lens to the Novoflex bellows unit. You could check out the Novoflex catalogue on line.