Voigtlander 40mm 1.4 MC lens mount "click-in to stop rotation

[Tom1234]

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I bought a Voigtlander VM mount 40mm 1.4 MC version lens from Japan and another from B&H in New York.

Both MC lenses would NOT mount on a Leica M7 body while 6 other VM Voigtlander lenses that I own mount fine.

The PROBLEM was that the lens would not "click in" to stop it from turning on the body. The camera click-in arm just rode on top of the "U" click-in stop-rotation slot and would not fall into the lens mount's "U" slot.. All other lenses click-in to stop rotation correctly.

The Japanese lens seller took the lens return as did B&H in New York.

The Japanese seller told me that they sent it back to Voigtlander who seemed to deny to them that there was a problem with the lens (which the seller did not believe). B&H said that they would send it back to the manufacture without comment. Another seller (that I did not buy from) blamed the click-in problem on my M7 camera body which is almost stupid since about 30+ lenses I own click in M-mount fine.

A 40mm 1.4 SC lens I bought mounted fine... only the MC versions had the mounting click-in problem.

Has anyone else out there had this problem, which I had in December 2023.

[pippy]

I've been using an MC 40 1.4 Nokton for ten years with no issues on any of my 3 M bodies ever.

Perhaps somewhere along the line since those days either Leica's body - or Voigtlander's lens - tolerances have changed slightly?

Philip.

 

[Tom1234]

Data below on the 40mm 1.4 MC not mounting correctly with text of problem included.  Click on pictures to read.

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