notabob
Contributor
Guess everyone has their favorites. Canon makes some very nice cameras that take awesome pics underwater. Their S series 3 and 4 megapixel cameras (S30, S40, & S45) are your low cost alternative, since Canon also makes a housing that fits all three and costs <$200. S40 has the same sensor and a lot of the same innards as the G2. The S45 is the same, but similar to the newer G3. G2 has consistently been rated on top of the 3-5MP range of cameras (at least in most comparison tests, albeit not in all), beating out the Olys and Nikons. The only limitation of the G2 is the lack of OEM housing for it and the need to buy the more expensive Ikelite (or one of the other alternatives). Canon also makes a housing for their 2MP camera, the A40. That one is significantly cheaper, but if you're just starting out on the digital path, you'll probably want to skip 2MP in favor of higher resolution.
With all of that said, Olympus cameras have become more popular for UW use, due to increased availability of a cheap(er) housing for their top end cameras (the Cx0x0 series). You will also likely find more users using the Olys and thus more readily available answers to your questions. Nikons are somewhere in there as well. They make very nice cameras that take some very nice shots as well, but no OEM housings. So all your housing options are once again $$$.
-Roman.
With all of that said, Olympus cameras have become more popular for UW use, due to increased availability of a cheap(er) housing for their top end cameras (the Cx0x0 series). You will also likely find more users using the Olys and thus more readily available answers to your questions. Nikons are somewhere in there as well. They make very nice cameras that take some very nice shots as well, but no OEM housings. So all your housing options are once again $$$.
-Roman.