hetland, i'd like your opinion of a good affordable video camera....I was like days away from buying one! Josh
Josh, I'm a camera snob, and, as hinted at above, I'm biased against GoPro. My biggest argument is that you have to buy extra stuff for it to work underwater, even though it's marked as an underwater camera, and, the video quality just isn't that great. You're essentially paying for its tininess. At minimum, you'll need a special lens port to make the video viewable, but I think GoPro is finally shipping cameras with it. Personally, I would have one for scooters or gun-cams, but that's about it.
That said, watch some actual GoPro underwater videos. I'll emphasize that they need to be UNDERWATER, and shot in conditions similar to the ones in which you will be shooting. If you're happy with what you see, then don't let me talk you out of the GoPro. If it makes you happy, that is all that really matters.
I don't know much about dedicated video cameras. In recent years, digital cameras from DSLRs to Compacts have come with video options that make it harder to purchase a dedicated video unit. The cost to say, add a wide-angle lens to a video camera is exponentially higher than the cost to add one to a digital camera that happens to take video. If you're shooting for the internet, then a digital camera will serve your purpose.
Canon, Nikon, Sony, Panasonic, Olympus all make really good cameras, and you really can't go wrong with any of them. I prefer Canon because they manufacture their own underwater housings, which makes it easier to find one. A canon housing is generally waterproof to 130ft (though I have taken mine slightly deeper with no ill effects). They are decent housings, and you get a good deal as they usually run about $170-$250. Obviously an Ikelite housing will be more robust, and an aluminum housing is even better, but we're talking big-bucks now.
If I were to purchase a camera tomorrow, I would likely buy a Canon PowerShot S100 ($364) and Canon housing ($230). Obviously this is much more expensive than a GoPro, and you'll likely have a lower frame rate on the Canon, when shooting in HD, but you can't use those extra frames on the internet anyway (unless something has changed).
If money wasn't an object, I would go for one of the new
mirrorless SLR cameras like the Sony Nex, which split the difference between DSLR cameras, and compact digital cameras. I wouldn't choose a DSLR because they're just too big underwater, and too expensive (even if money isn't an object!) to outfit properly. Mirrorless SLR's hove their downsides too, as you have to chose a lens, and if you chose a macro lens, and find out underwater that you need to make some wide-angle shots, you'll have to call the dive and change things out. Compact cameras give you more of a choice, especially with stackable wet lenses available.
All the companies above make cheaper cameras that would be fine for underwater video. Check out
Reef Photo & Video!, The Underwater Photo Pros for info on housings, including some good tips on how to care for your gear. If you're on the fence about a particular model, you can find detailed reviews here:
Digital Photography Review but keep in mind that what works topside, doesn't always translate into what works underwater.