Picked up a trick for cleaning fungus off lenses at a repair meetup in Portland last month

I went to this camera repair meetup at a community space downtown. One guy showed me how to wipe fungus off internal elements using a q-tip and hydrogen peroxide. Tried it on an old 50mm that had a little spot and it actually cleared up. Has anyone else tried this method or got another way that works?

3 comments

3 Comments

ross.river1mo ago

Used to think peroxide would mess up coatings but this actually worked fine on my Minolta.

robin_foster11mo ago

Peroxide's fine on most multicoated glass, it's the older single-coated lenses you gotta watch.

sandralee1mo ago

Exactly @ross.river, newer multicoated glass holds up way better than people give it credit for. Your mileage may vary with older single-coated lenses though, especially if the coatings are already flaking.