I'm a bit of a novice documentary filmmaker and I'm going to be riding my bicycle down through Central & South America to film and I'm wondering what I can do to avoid damaging my camera from the humidity. Are there plastic bags made specifically for camera's for this kind of a condition? I have a Song PDX-10. Any other tips on shooting in this kind of environment would be much appreciated.

I would like into raincovers and underwater housings. I'm not sure
if they have a specific model for your camera, but some brands are:

pelican (http://www.pelican.com/), gates (http://www.gateshousings.com/), ikelite (http://www.ikelite.com/), ewamarine (http://www.ewamarine.com/)

Chris,

I would strongly suggest you get some selica gel paks (they come in 1.5" square plastic packs for your lenses, plus some plastic bags with good rubber bands. Be especially careful about moving in and out of highly air-conditioned environments as this is when moisture condensing inside your lenses will create a perfect setting for fungus to grow. Once fungus has formed inside your expensive optics, you're pretty much through with shooting unless the blotches in your footage are not particularly apparent.

To clean any fungi from inside your lenses is a very expensive process, costing you anywhere from $100-600 to replace the affected elements.

It is obvious that you must have some kind of rain protection if you plan to be shooting exteriors most of the time. Good luck.

Collis Davis