TTL or "Through-The-Lens" flash metering means the strobe interprets information from the camera to control flash duration and properly expose an image. TTL may be accomplished directly through electrical signals from the camera, or indirectly through watching the behavior of the camera's built-in flash. Circuitry built into this housing allows the camera to communicate directly with compatible underwater strobes. When connected via this circuitry, the camera learns that an external flash is attached and is able to more accurately adjust exposure by knowing this. The camera's flash will not fire, eliminating the shutter lag associated with waiting for the camera's flash to recycle. The Ikelite housing for the Nikon Coolpix P7800 includes built-in proprietary circuitry which tells your camera that a TTL external flash is attached, allowing the camera to adjust exposure more accurately. Spend more time showing off great photos, and less time tinkering in Photoshop.
The Ikelite-style electrical bulkhead is widely recognized as the most reliable waterproof strobe sync connection available. In order to communicate with the camera, compatible Ikelite DS strobes must be connected to the housing's electrical bulkhead using a single or dual TTL sync cord. Non-Ikelite strobes may be connected to this bulkhead using a compatible sync cord, however the housing's circuitry will not receive power and the strobes will operate in manual exposure modes only. Whether in TTL or manual exposure, use of an electrical sync cord eliminates the issues of signal interference, inconsistent exposure due to weak fiber optic transmission, and false triggering caused by light rays bouncing off the water's surface or your buddy's flash going off. Sync cords are comparably priced to fiber optic cords and are equally durable.
Durable polycarbonate and acrylic construction provides a unique view of the camera to ensure correct waterproof installation and confidence underwater. Simply close the two stainless steel locking lid snaps, and see the o-ring form a solid black, watertight seal that provides a depth rating to 200' (60 meters). Large, ergonomic controls provide access to all important camera functions including front and rear dials. An included tray with soft-grip handle provides comfortable handling underwater and Ikelite's signature quick release attachment system for lighting accessories. Ikelite products are designed, built and tested in the USA. Ikelite uses locally sourced, top-grade materials. Ikelite housings are built by hand and individually tested for fit, function and waterproof integrity. Ikelite backs their products with over 50 years of experience and service within the dive industry.
All camera controls are functional through the housing via mechanical buttons and dials except the monitor button, flash pop-up control, diopter adjustment control or F1 button. Housing uses Ikelite 5-pin bulkhead with TTL circuitry, is near neutral buoyancy in fresh water and the tray mounts with 3/8-16 bolts have 3" (76mm) spacing. The housing is equipped with a 3.9" (99mm) diameter glass lens port measures 7.4" x 6.4" x 6.8" (19cm x 16cm x 17cm) including projections and weighs 4.7lbs (2.1kg). The housing comes with a tray with handle, vinyl port cover, flash diffuser, flash deflector silicone lubricant 1cc tube, instruction guide and is covered by a 12 month limited warranty.
This product has a limited warranty of 12 months.