However, if the fungus hasn't had time to do its evil work on the glass, it may be cleanable.
I don't know exactly how lens fungus spreads, but I'm very paranoid about it, and the one time I bought a lens on eBay that appeared to have fungus, I immediately quaranteened it, keeping it far away from my other camera equipment. Eventually I was able to work it out with the seller, and I sent it back to him. I didn't even want to mount it on my camera. Fungus spreads with spores, right? That being the case, it can spread to other lenses stored nearby (that's 100% pure theory; I'm not sure at all).
Ian Lind wrote:
I came across several old Pentax lenses which have probably been in storage for at least 20 years.
Nothing fancy. There's an 85 mm, a 35 mm, and a standard 50 mm.
They aren't beat up, but when I hold them up and look through them, there appears to be fine bits of dust on inside surfaces, and other very fine "stuff" that almost looks like mini-spider webs.
Is there any way to do interior cleaning of such lenses or should I just dump them?
If it's pretty hopeless, I'll offer them to someone who might want to experiment...
