This Light & Motion super-wide-angle lens is for most HD Bluefin housings, including those for the Sony HDR-HC3, HVR-A1U and HDR-HC1 camcorders. The lens has a 80° angle of view. This allows you to get closer to your subject.
Less water between you and your subject will produce more contrast and better color, thereby increasing the quality of your footage. A wide-angle lens is the only way to go to film large fish, shipwrecks, and underwater scenes that include divers.