I have a walk-in closet and my lenses are on a shelf in that closet along with several film cameras. Those that have bags or hard cases are in those cases. All have caps on, front and rear, and most are stored vertically.* My K-3 is in a messenger bag on the floor along with a few lenses. Also on the floor is: a smaller bag with a loaded film camera and a couple of lenses for it, two tripods (bagged), a couple of boxes with flash stuff, and a larger box with the Chamonix view camera and supporting kit. The closet is seldom particularly hot or cold with extremes being 80F and 60F respectively. Although my region has high rainfall, humidity is seldom high inside the closet.
There are also a number of cameras (mostly vintage/antiques) on display with appropriate lenses in the living areas of the house. They are out in the open, but never exposed to direct sun. Yes, I have too many cameras, but am still a minor player as far as collectors go. Oh! I almost forgot. There is an Olympus XA in a small Cordura case waiting to be thrown into the pack or carry-on on the spur of the moment.
None of my lenses or cameras have caught fungus and none have become fogged by plastic outgassing either. Everything that I bought new is v. good to excellent condition due at least in part to using cases or wraps for protection in the field.
Steve
* We have had four earthquakes in the 12 years I have lived here and I often wonder about the wisdom having those lenses loose on a shelf when they might pitch off onto the floor.
Last edited by stevebrot; 06-13-2018 at 10:56 PM.