I use only Pentax spotmeters, though I once owned a Minolta one which read identically. I've dropped these in icy streams (twice in the same summer), and had to rely on memory for my exposure, which all came out perfectly, even the 4x5 chromes. But even these devices are fairly low tech and can be dried out. I keep a little dessication box in the truck for when I return from potentially soggy trips. It consists of a tight Tupperware-style lid, some sealant tape, and freshly baked-out indicator silica gel inside. If a lens or meters gets fogged up due to moisture, I'll put in there, seal it up, and wait a couple weeks. Usually work without need for an expensive repair. Don't try that out in the desert where the water might have high mineral content, or you risk permanent damage to lenses. Some of those dissolved chemicals will actually bond to glass, just like silicates. All camera gear is obviously some kind of technology, but the less technology the better, at
least if you ever need to repair things in the field.
