Buying a water-housing for your SLR camera will cost you some serious coin and chances are pretty good that the camera in your iPhone 4 or 4S shoots a comparable quality image. Therefore, the Tat7 waterproof case is a brilliant idea. It costs a lot less than a big, bulky housing and is scuba-worthy down to depths of 100 feet. You can even use SIRI on your 4S for texting and messaging without taking it out of the case.
Tat7 iPhone Scuba Case