My only waterproof camera – the Minolta Weathermatic Dual 35. It became available in the late 80s. It has two electronically selectable, internal autofocus lens settings, 35 and 50mm. When the front optic is covered by water the camera defaults to a fixed focus setting for all underwater shooting and is rated only to a depth of 1/2 atmosphere. Not a serious underwater camera, but great for snorkeling, canoeing, beach, waterpark, and general photography anywhere one would not take a camera that might fall prey to water and sand. Below, the underwater viewfinder is strapped on for easy viewing through a mask at either 35mm or 50mm. Oh yeah, it floats.