Like the Pentax Optio W30, the 7.1-megapixel Olympus Stylus 790SW is waterproof to 10 feet. But it is a little more challenging to use in the water than the Pentax. Where this camera really shines is in the snow, on the mountains, and on kayak and rafting expeditions. It's waterproof, can handle a five-foot drop, has a built-in flashlight, and can operate down to minus 10 Celsius (that's 14 degrees!) for all but the most frigid ski and snow adventures.