The Canon PowerShot D30, at the time of its introduction, has the deepest waterproof rating at 82 feet, but frankly, that's really all it has. The f3.9-4.8 lens is average for a point-and-shoot, but when you're heading underwater, there's a lot less light so good lenses are a must. That far underwater, you'll have to rely on using the flash. The D30 has a 1.9 fps burst speed, so it's quite a slow camera. If the D30 had a budget price, we'd be tempted, but for around $350, you could get the excellent Olympus TG-2 or Rioch WG-4, both that have much better lenses and shooting speeds. Sure, the D30 has the best depth rating, but without a good lens, you can't really take decent pictures that far away from the sunshine anyways.