Security System
One of the worst aspects of water photography is the fear that this dive could be the last for your precious camera. The integrity of the o-ring seal is the most important aspect of a good underwater housing and up until recently, there was really no way to know if your housing was sealed or not.
A simple stray hair, bit of sand or fuzz can not only ruin the camera, but also your day or the whole trip. Why risk submerging your fragile photo gear without some assurance that the o-ring is clean, and will hold fast against the pressure of the ocean depths?
This is the reason our water housings come with security system!!