Alberti
Well-known
I once bought a J3 Pi and it focussed stiff. So I used Brian's recipe for dis/assembly, greasing. Had placed my own the marks. [There were several already].
Well, when I turned the thing back on, the barrel was out of sync. That happens to me of course only.
The interesting part.
So after about twenty tries I almost gave up and tried the second cam (near the back). I can be turned 180 degrees. Twisted it the other way. That is the interesting part. Put it all back, all rings were now very far off (about 120 degrees either way. And I found a second pit for the screws, about 5 mm off.
\Used that, and the lens was SPOT ON at 1m and full opening. The best I ever had (like the Leica 50). Great sharpness.
Unfortunately, the bug caught me. 😱 I did not like the cams all off so I sold it it. Have regrets ever since.
Well, when I turned the thing back on, the barrel was out of sync. That happens to me of course only.
The interesting part.
So after about twenty tries I almost gave up and tried the second cam (near the back). I can be turned 180 degrees. Twisted it the other way. That is the interesting part. Put it all back, all rings were now very far off (about 120 degrees either way. And I found a second pit for the screws, about 5 mm off.
\Used that, and the lens was SPOT ON at 1m and full opening. The best I ever had (like the Leica 50). Great sharpness.
Unfortunately, the bug caught me. 😱 I did not like the cams all off so I sold it it. Have regrets ever since.