Something odd on my M 35mm Summicron

[Bill Hartung]

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Has anyone had this experience?  Yesterday I noticed the front ring of my 35mm summicron M is loose, so that it rotates freely.  This is the ring that features the index mark for setting the f stops and the female threads for mounting filters.  It doesn't feel loose in any other way, just turns without any click or other sense of stopping.  Otherwise, the lens is sound and performing normally.

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[pgk]

It sounds as though a locking screw has loosened and the front ring is therefore allowed to rotate. I'm sure that there are threads on this already so try searching through the forum.

[28framelines]

I’m assuming this is the 35mm Summicron ASPH Mk 1 (also referred to as the v5)? If so, I believe it’s a common problem but also a pretty simple fix

[Casey Jefferson]

EDIT: Oops wrong video above, should be more like below:

 

 

Edited October 12, 2023 by Casey Jefferson