[PaulHoule]

I was a big fan of USM lenses when I had a Canon, but I had one go bad with fungus or something and for a while had only a 35mm prime which I even used to take pictures of birds. Then I lost my Canon and decided to get a Sony circa 2019 or so because all the reviews I saw for Nikon and Canon said the autofocus sucked on entry-level full frame cameras.

[lambdasquirrel]

You should be able to get fungus CLA’ed. Leica shooters using true vintage lenses sometimes need to do this when picking up a find from a flea market.

[Lammy]

To save anyone else looking it up, CLA == Clean, Lubricate, Adjust

https://photo.stackexchange.com/questions/15613/what-is-cla-...

https://markorussa.wordpress.com/2015/08/31/general-instruct...