TTL or "Through-The-Lens" flash metering means the camera controls flash duration to properly expose an image. The Ikelite housing for the Canon EOS 70D 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.
Fiber optic slave flash units require the camera's flash to fire every time. This constantly drains your camera's battery life, builds up heat inside of the housing, and creates a shutter lag as you wait for the camera's flash to recycle in between shots. The Ikelite housing for the Canon EOS 70D translates direct electrical impulses from your camera, triggering your strobe and precisely adjusting its power without the need to fire the camera's flash.
In-line communication between the strobe and the camera completely eliminates signal interference and false triggering caused by light rays bouncing off the water's surface or your buddy's flash going off.
Controls are customized to put all important camera functions within comfortable reach. We bring video record start/stop and AF lock out to the side of the housing for quick access using your thumb without taking a hand off of the handles.
For a system of this caliber, a tray with dual handles is essential to good handling, balance underwater and attachment of external lighting. An aluminum tray with right- and left-hand rubberized grips is included with the Ikelite housing for the Canon EOS 70D, providing balance and comfortable hold, plus two quick release points for strobe and video arms, and tripod attachment holes. The complete handle assembly removes with just two screws for traveling.