Ikelite Canon EOS 5D Mark II Housing Underwater Camera, Clear (6871.02) External Flash Ready: eTTL compatible with DS digital strobes Clear Polycarbonate Construction: Strong and corrosion-free, unobstructed view of the camera's information and control functions with visual confirmation of the O-ring seal Enhanced Viewing: The Ikelite Super-Eye magnifier offers enhanced viewing, when you're wearing a diving mask The dependable controls are conveniently placed at fingertip and kept water tight with Ikelite' s pioneered Quad-Ring seal glands, one of the most reliable methods for sealing controls Multiple Lens Capability: An assortment of interchangeable lens ports allow use of most macro, wide angle, and zoom lenses.Slightly negative buoyancy in fresh water