I have found a cheapo way to prevent fungus. And all it cost is a bit of electricity and a locknlock vacuum bag.
(1) Humidity is water in the air.
(2) No air = No water
- Put camera and lens in locknlock vacuum bag.
- Suck out as much of the air as possible.
- Voila, don't think fungus can grow in partial vacuum and low humidity.
BTW.... trying to find out if the camera lens has lubricants that will dry out in the bag. However, since I take the camera and lens out once in a while... maybe I can get away with it.