My Underwater Bag
For the best results I use my old DSLR Canon 5D Mark II with the Ikelite Housing - it lets me use camera controls underwater, and my EF 16-35mm f/2.8 zoom lens.
For my fun traveling underwater outings the compact underwater OM camera System: Tough Camera can't be beat underwater - it shoots in RAW which means more colors are preserved for post processing, plus it has its own underwater housing. I prefer to shoot with my Kraken 24mm lens with dome attached to this camera.