One of the biggest problems I have run into while filming is that the lens gets all fogged up with basically anything when I take it skiing. I usually wipe it off with cloth or something, but it still doesn't look as good as it could. Any tips on keeping it clear? Cat Crap maybe?
if you make sure you cool your camera from room temperature or warmer (indoors) to the cold outdoor temperature slowly, and shoot with it when it is the same temperature outside, it won't fog up.