This Ikelite 6240.45 Ultra Compact Housing is designed for the Canon PowerShot SD4500 IS digital camera. It is an injection-molded clear polycarbonate case, known for its strength and corrosion-free properties. The housing offers an unobstructed view of the camera"s information and control functions and operates safely to a depth of 200". An easy-open latch along with drop-in camera loading make set-up a breeze. The housing has slight positive buoyancy and handles superbly underwater. | A flash diffuser is included to improve lighting quality when the camera"s built-in flash is used underwater. For optimum lighting underwater an optional external strobe is recommended. Ikelite strobes are brighter, recycle faster and offer wider coverage than the camera"s flash. Being farther from the camera lens, the strobe reduces the illumination of particles in the water, which helps eliminate backscatter. | Wide-angle and macro lenses with a 67mm thread can be attached directly to the port. Getting close to your subject will greatly increase the quality of your underwater photos. By eliminating as much water as possible between you and your subject, you will get increased contrast and better color. The wide-angle conversion lens can be attached and removed when underwater.