Capture vibrant images and video of sting rays, parrot fish, and coral at 200' beneath the surface with your Canon ELPH 520 HS/IXUS 500 HS camera in this Ikelite Underwater Housing. External lighting is more powerful than your camera's built-in flash, but your flash can be used to trigger an optional, external AF35 AutoFlash strobe as a wireless slave, replicating TTL exposure. As an alternative, two fiber-optic ports are provided for connecting optional cables. The housing also includes a diffuser to soften your built-in flash and a deflector to redirect the light towards an external strobe. This added lighting will provide greater color accuracy and vibrancy, and it can be placed in a position to virtually eliminate backscatter, glare, and hard shadows. Built for durability, the housing is designed, constructed by hand, and tested in the USA. A corrosion-resistant, clear polycarbonate body offers a full view of the camera, allowing you to monitor the O-ring seal to ensure correct waterproof installation. Large, ergonomic mechanical controls provide access to all camera functions. The camera mounting plate features a 12-24 thread tray with 3" spacing. The housing's built-in, flat glass lens port has a 3.0" diameter. Since light is absorbed very quickly as it passes through water, optional color-correction filters can be added to enhance colors below the surface. The port also accepts optional external lenses with 67mm threads, to allow an increased field of view or extreme close-up shots with better clarity and detail, respectively. It is compatible with Ikelite' s optional 6420 W-20, and other optional, external 67mm threaded, wide-angle or macro/diopter lenses without the need for an adapter. An external wide-angle conversion lens increases angle of coverage so you can get closer to the subject while still fitting everything in the frame. Moderate vignetting will occur at widest-angle settings with these lenses.