This fungus thing is starting to freak me out, but I always thought fungus looked sort of like roots growing across the lens. This looks more like an even coating of crud, although there could be some root-like tendrils underneath once I check it out with a flashlight. Would mold as opposed to fungus be more likely to have this appearance?

Unless this turns out to be easily cleanable or a tremendous deal I think I'll walk, I don't want to risk infecting my other film gear which is working quite happily at the moment.