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11-04-2013, 04:25 PM   #1
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Glueing a Loose M Lens Focusing Ring?

My M series 50 mm f1.4 lens is in good working condition except for the rubber/plastic focusing ring rotating loosely, and independently of the underlying focusing helical; the helical itself is fine. It will focus appropriately if I pinch the ring tightly enough to turn the focusing mechanism.

I am thinking of glueing the focusing ring. My concern is that I do not want to glue the lens into a fixed position. The focusing ring appears to be made of plastic rather than rubber, and I seem unsure of how to take it off or loosen it enough to apply the glue.

Any suggestions or ideas?




11-04-2013, 04:36 PM   #2
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Just gently work it off over the front, the lip that holds it on is not that big. I prefer to use some double sided tape instead of glue for this.
11-04-2013, 05:14 PM   #3
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You have to ask yourself though how it got loose in the first place. I bought M 50/1.7 new in 1982 and it is as tight today as the day I bought it. I think Pliobond might be a good option.

11-04-2013, 05:36 PM   #4
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I used Surfboard Wax that I found at the local camera shop(why they had some is beyond me and the one of the salesmen didn't know)and it worked like a charm. i even use it on the arms of my glasses to stop them from sliding forward. A thin layer is all that's needed and it's what I used on my pristine A50-1.2. You can apply it to the barrel or inside the grip.


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