All of the professional-grade features a camera of this caliber demands. The only D800 housing to offer built-in hard-wired true Nikon iTTL metering with an underwater strobe. And more than a little pocket change left over for your next equipment purchase. Superior flash control Direct connect flash is the most reliable and efficient way to fire an external underwater strobe. The camera's built-in flash does not need to fire, providing the extended battery life and no lag between exposures. Our proprietary circuitry allows direct communication between the camera and current Ikelite DS Substrobes* for the most accurate through-the-lens (TTL) metering control of an off-camera flash. Electrical bulkhead and TTL circuitry are provided standard and included in the base purchase price. Rather than reaching out to your external strobe, exposure with a current DS Substrobe can be adjusted quickly through the back of the housing using a large dial control. TTL mode provides four 1/3 f/stop increments over or under flash compensation to fine tune exposure. Or control strobe output completely through the back of the housing using one of the 7 manual power settings provided in half-stop increments. Ergonomic handling Controls are provided for every camera function except the metering selector, diopter adjustment control and flash pop-up button. Shutter, video recording start/stop, and a large zoom control knob can all be comfortably reached without removing your hands from the handles. Comfortable rubberized grips provide quick-release attachment points for strobes and accessories. The try and handles may be removed from the housing for convenience in traveling. The complete housing is neutral or slightly negative in freshwater depending on choice of lens port. Reliable performance A clear view of the camera and o-ring seals facilitates easy assembly and operation. Heavy-duty polycarbonate constr