Does fungus damage glass?

[@classic.cameras]

Wondering have you ever repaired a Canon FD 85mm f1.2L and did you make a video?

[@diyextravaganza]

Hello, no, I've never had the opportunity to have such a beautiful lens in my hands. Tried to buy one at an auction a while ago with what appeared to be separation but the price skyrocketed ☹️

[@campbells0ups]

i have a Steinheil Munchen Quinon 55/1.9 that has the back glass etched with deep fungus. tried to soak and scrub the element but it wont come out

[@diyextravaganza]

That seems to be one of those rare cases in which it actually affects the glass, does it affect the image much?

[@campbells0ups]

@@diyextravaganza somewhat. some fine details are lost, slightly contrast, but the image is recognizable and usable

[@diyextravaganza]

That's what matters at the end, isn't it?