The new SeaLife DC500 features a new "Shark Mode" for faster and sharper pictures of moving objects underwater and in sports photography on land. The Shark Mode is activated by simply pushing the camera's OK button which focuses on the intended subject. The camera will now remember that focus range and take sharp pictures with virtually no shutter lag. Underwater, in diving or snorkeling, everything moves, the diver as well as sea creatures are in constant movement. In addition to the Shark Mode, the automatic Sea exposure mode will shorten the exposure time underwater for sharper pictures.