New leica M6 and lens mount resistance while locking a lens

[_leicaguru]

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On 2/3/2025 at 3:12 AM, DimLs said:

Hi all,

I got a new leica m6 and I noticed when locking lenses I feel no resistance when turning the lens till it's locked. I have used some (4) digital M bodies and I remember none had such such a feeling. Currently I also own a M4-2 and as I turn the lens it progressively increases its resistance till its locked. The resistance is little but its very clearly present, and feels just right.

With the new M6 with the same lenses, the feeling is buttery smooth, practically without resistance from the beginning of the rotation till the lock. If there is progressively any resistance it should be so slightly present that I can barely feel its increase, if at all.

While turning the lens I tried to see how much play there is and with 2 lenses. After a  turning point, I cannot feel any play between lens and camera mount. But it's not scientific. If I could feel a small resistance I would be sure that the contact between the mounts is tight enough. Now it's not tight but also it seems that with the 2 lenses I tried there is no play.

It seems that the contact/sealing is just barely ok. This worries me as I feel it's highly possible that with another lens the fit could not be correct. I am also wondering if the fit will loosen with time/friction. This would be that there would be play between the lens and camera mount.

What is your experience on this? Should I ask for a replacement? I must confess that I have good reason to not trust Leica if it responds with a "there is no problem" answer.

Thank you.

Turn off all the lights in the room. Shine your phone flashlight through the front of the lens. If there's no light leaking around the mount then everything is straight and fine. 

Edited February 3 by _leicaguru

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[Deeetona]

Alternatively, lube the lens mount with buttery butter

[earleygallery]

22 hours ago, Deeetona said:

Alternatively, lube the lens mount with buttery butter

Butter should only be applied to the actual lens for ‘creamy bokeh’ effects.

Extra Virgin olive oil for any camera parts.