Thanks for your quick replies!
Quote: i can only imagine fungus getting in when the lens is unmounted - otherwise the seals are quite resistant to water. Sooooooo... either you didn't keep them dry enough or your lens sealing isn't working. Except you'd probably notice the sealing not working if you used them in the rain.
Yes of course they where not always mounted on the camera. So I understand they where exposed to high humidity.
Quote: Take a tip from those of us who live in the tropics with very high humidity. Keep your gear in a dry case or a dehumidifier where the RH can be adjusted to about 40%. Using silica get is next to useless and don't forget it is easy for a camera bag to retain moisture.
But when travelling it's not possible to carry a dehumidifier or a box with a bulb with you. Especially when you try to keep your luggage as light as possible.
Quote: Also, about your silica gel packets - are you certain they were dry?
Yes whenever I've checked them they where absolutely dry. So I was wondering if they are working at all.
Quote: Bath them in strong UV light.
This does only work to prevent fungus - it doesn't let it disappear, doesn't it?
So it would be great if you could tell me if a camera repair center could heal them at all. What I read was that most lens companies don't offer such a service themselves. So I must rely on a 3rd party repair center. But I'm afraid they won't be able to deal with a WR lens and the mentioned collimation. And the expected price...