Advice regarding problem mounting a Leica BM Lens on camera?

[bill_carson]

Hi Leica Experts:

 

I recently sold a Leitz 135mm-f.4.0 Tele-Elmar via eBay. The lens is

in unusually good condition - a real solid Mint. I checked it out

100% prior to shipping and it was AOK.

I packed it very carefully -- and adequately. I have been advised

that the lens will not "click" in place when mounted on an M mount

camera. It will rotate but does not click and becomes disconnedted

when the focusing mount is rotated. This is a new one to me and there

much be a simple explanation as the shipping box etc. showed no

damage.

 

Any ideas as to what might cause such a problem? Thanks for your

advice. Bill Carson

[jay_.]

Is the lens being mounted on an M6-M7? If so, the lens-lock guard may be interfering with the mounting of the lens. I had that with one M6 body and my 135 T-E a while back. The cure was to take a scalpel and very slightly increase the angle of bevel where the guard comes up to the lens-mount flange on the body. The guard is plastic and can be cut or filed easily. No other lens was giving a problem--evidently the 135 T-E has a slightly wider diameter flange than others--we're talking tenths of millimeters. I'm not saying that's the answer in your case, but it was my experience.