For the most discerning of underwater photographers we offer a full-featured yet affordable camera housing for the Canon Powershot G11 and G12 digital cameras. This durable housing is molded of crystal clear polycarbonate for corrosion free operation up to a depth of 200ft (60m). Every camera function is accessible in this very sophisticated housing installation. * Front Dial control is inoperative when used with the Canon G11 camera. The housing comes standard with an optical grade glass flat port which allows full use of the camera's zoom range without vignetting. A flash diffuser is included to improve image quality when using the camera's built-in flash to illuminate the subject. Special conversion circuitry built in to the housing provides true Canon eTTL exposure connected to any current model Ikelite DS Substrobe. The camera controls the Substrobe's output resulting in effortlessly perfect exposure. The included tray and release handle offers balance and exceptional handling while providing a convenient attachment point for optional Substrobe mounting arms. Strobe arms can be released easily at the touch of a button whether above or below water. The optional Dual Handle and Tray assembly #9523.32 provides even greater stability and allows for the addition of a second Substrobe. Size and Weight. 7 wide x 6 high x 6 deep (10 wide with tray and handle attached) 17.8cm x 15.2cm x 15.2cm Less than 6lbs (2.7kg) above water with camera installed Slightly negative in saltwater for stability Color Correcting Filters. Optional color correcting filters replace some of the reds and more natural tones that would otherwise be lost. Available for tropical blue water and green water settings. Filters are effective in shallow, sunny conditions depending on water clarity. For optimum results use in combination with manual white balance (see camera user guide for information on setting custom white balance). #6441.46 UR/Pro filter for tropical blue water