Jim, I made a trip to the Cayaman Islands & knew that I was going to make a few shallow dives at Sting Ray City. Rather than schlep a Mamiya 645 with an underwater housing, I bought a few Kodak underwater throw away cameras that are pre-loaded & set for a certain distance with a plastic lens. I think you could use them at depths of 8 or so feet. I got some great shots with that cheap camera!