P. Lynn Miller
Well-known
No has mentioned in influence of the environment with these problems or lack of... I never had a single issue of fungus with my large collection of lenses until I moved to Sydney, Australia... now all lenses are serviced on a 24 month rotating schedule... heat, moisture, cold, humidity or lack of, rapid thermal changes... hot to cold or vice versus... all effect materials and fasteners... especially when different alloys and materials... glass, brass, aluminum, stainless... are used together. And this does not just apply to camera lenses... all precision components suffer from the same maladies...