Jupiter-3 with stucked aperture ring

[BurstMox]

Hello everybody,

I received today an early Jupiter-3 with stucked ring.

In fact, it's stucked because it's quite deformed. Here is a picture :



Anyone has idea if it's repairable, if yes how. Optical block can be easily removed from the mount. I prefer to ask before trying myself to fix it.

Thanks,

[BurstMox]

I managed to solve this ring problem, but now is another problem : grease in aperture ring is totaly dry, so I can open/close it, but only with tools!

[BurstMox]

Problem solved, lens fixed. Thanks for watching

[Olivier]

How did you fix that , Pierre ?

[BurstMox]

About the deformed ring, I simply used harmer with a peace of wood to not damage the ring. I read somewhere here someone used this technic to solve problem with beaten filter treat.

When this first problem was solved, ring still didn't move. Second problem was grease. I didn't relub it, I just lot of time turned it with tools, to make it more and more easy to turn. Now, I can use it without a problem, turn almost smooth from wide open to 8 or 11 with hands (I don't need more for a portrait lens). But then occcured another problem : When optical block was on mount, aperture didn't move! Problem was that the ring on the treat (to fix optical block) was too thin. I guess someone changed it. I used a Helios-44 ring (thiker), and now, it works like a charm .

I think everything on this lens was made to block the aperture ring, even if this one is in good condition

[Olivier]

Thank you Pierre.