Minor problem mounting Zeiss Biogon 35mm/2.8

[logan2z]

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I just received a Zeiss Biogon 35mm/2.8 that I rented and have been having a minor issue mounting it to my M2.  The lens fits into the mount fine, but won't turn unless I lightly depress the lens release button.  Once I do, it turns and locks as expected.  The problem seems intermittent as sometimes it does turn without the release button being depressed, but most times it will not.  I tried the lens on my M4 and it worked a bit better there, but still felt pretty tight when it turned - tighter than the Leica lenses I own.  I don't know if this is an issue with the Biogon or just a matter of tolerances between the lens and the mount.  FWIW, I tried my 50mm Summicron on my M2 and it went on just fine.

Anyone else ever experience this with the Biogon, or any other lenses?

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[madNbad]

It’s the lens. I never had a problem mounting my Biogon on either my M2 or Millennium. The mount on the lens must be slightly off. See if if you can get a different lens.

[lct]

My Biogon 35/2.8 fits perfectly my M3, M4-2, M6J, M8.2, M240 and M11 cameras. I would return this faulty copy to prevent damages to the lens mount of your M2.

[logan2z]

@madNbad @lct

Thanks for the responses.  I'll return the lens and see if I can get another copy.

 

[CPA]

It’s definitely the lens. My C Biogon mounted perfectly on both my M6 and M-A.
 

Great lens. 

[logan2z]

14 minutes ago, CPA said:

It’s definitely the lens. My C Biogon mounted perfectly on both my M6 and M-A.
 

Great lens. 

Thanks, it's on its way back.