Hoyin Lee , Jan 28, 1999; 04:34 p.m.
Hi Angst, during my military posting to a jungle camp many years ago, I remember that the quartermaster stored all the optical equipment -- binoculars, scopes, etc. -- in a home-made 'dry-cabinet', which is an old timber cupboard with a 100W tungsten bulb fixed to the inside top panel. The heat produced from the bulb was supposed to be sufficient to keep the lenses sufficiently dry enough to deter fungus growth. A couple of holes were drilled near the top of the front and back panel to allow the heat generated from the bulb to escape. I had serious doubt of the effectiveness of the contraption when I first saw it, but at the end of my posting after a year, I was convinced of its workability when I saw no sign of fungus problem on the lenses despite the fact that the equipment had consistently been subjected to rain and water when they were used in the field. However, unless you're a trained electrician, I would recommend that you invest in a proper dry-cabinet rather than you make your own (fire risk!!).