From time to time, we come with camera lenses with some internal fungus. I always treat them like they have some diseases and sell them.
Now with the darkroom lenses, I just wonder if the standard is not that stringent. Is it better to use a Schneider large lens with some minor internal fungus than an average lens from Beslar?
How about the lenses with light internal fog. Is that worse than tiny fungus?
Any real impact on the quality of the prints?