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I know that the best is not to clean them, but how to clean an old lens when we have fingerprints and the glass or the coating is very soft? Summar, Summitar, Jupiters... I use a cotton swab with some cleaning fluid for lenses, but I do not know if it is the best option.

I am trying to adjust a 1957 Jupiter 8 for Leica. I´ve created several paper shims and after adding one it has improved a lot, but still has backfocus. Wide open and one meter after adding one shim: I do the tests with an M7, so I have to wait for the next development ... but I think with...

I have a Jupiter 8 from 1957. Is not adjusted for Leica but focus at one meter and wide open is very very close. The problem is the lens don't focus properly at infinity. The distance scale is at infinity, but the camera rangefinder is not. Any advice? Can I easy fix the lens? Thanks to all!!

Hi, I´m from Spain and I´m a film photography passionate with my Leica III and M with vintage lenses. Best regards!