ScubaLdy,
fungus is common in lenses that live in high humidity. Often, the damage is irreversable because the fungus damages the coating. You check for fungus or haze by shining a bright light through the lens while holding the aperture open. If you see an even film, you have haze. Haze is often caused by the migration of lubricants onto the optics and is fixed by a routine clean-lube-adjust. Fungus looks like frost or a spider web. Leica guys recommend
Focal Point for these repairs.
Preventing fungus is difficult if you live in a humid climate. Collectors store their lenses in sealed containers with silica gel packets to absorb the moisture. I read of a collector in Australia who kept his display case supplied with a dry air purge.
Nikon makes a few excellent inexpensive lenses. I'd stick with those for work in the tropics. You can find ut about them at
Ken Rockwell's website. The late
Galen Rowell had some interesting perspectives about throw-away lenses, too. When he shot what might be his signature photo, a rainbow over a temple complex in Tibet, he ditched his camera bag and ran to get the right angle while the light was perfect. His philosophy was that gear was expendable, while a perfect image could not be passed up. See the shot
here, and see some more of his work at
Mountain Light gallery.
Dan
How did you know you had fungus? My Nikon is not taking good pictures - they come out dim and can't be livend up. I'm not planning a trip to the states for awhile so am stuck using my little camera.