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Warning: I used to think you had to clean every single lens element on a disassembly, but that changed after a Leica M3 job in 2022.
I was working on a customer's M3 and spent over an hour cleaning each element, but the haze was actually only on the rear group. A retired repairer in Chicago told me, 'You're just making dust problems and risking coatings,' and he was right. When do you guys decide to leave well enough alone on a lens clean?
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king.val26d ago
Why risk it if it's not needed?
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susan_adams26d ago
Totally get that, had the same thing with an old Nikkor. You shine a light through and if the haze is only in one spot, just clean that group. Like king.val said, why risk messing with the good ones. I learned the hard way after putting a tiny scratch on a front element being too careful. Now if it looks clear, I leave it alone lol.
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