A waterproof housing is a case that is designed to be watertight to a specific depth (pressure) and is used for shooting photos and videos underwater. Waterproof housings are usually designed to be used with specific camera models. They use O-rings to ensure watertight integrity.nikongrossary
Waterproof cameras are designed to be used underwater to a specified depth, and for a specified period of time.
A design that has seals to prevent water finding its way through joins, external controls and screw points. This type of product often has a bulkier bodies but is perfect for water sports and use in bad weather.