If it wasn't for underwater cameras, we'd never get to witness the beauty and wildlife that live beneath the waves. The basic fundamentals of photography are the same no matter where you are taking photos. However, when light travels through water instead of air, special equipment and techniques are used for getting good photos or film.
There are various types of underwater cameras, from movie and video cameras to disposable and digital models. These cameras are specifically made for use underwater, however almost any camera can be used as long as it is protected inside a water-tight housing.
You should know what type of photography you will be doing before buying your camera. Will you be taking close up or wide angle shots or focusing on fish. Each type of underwater photography involves specific camera configurations, flashes and lenses. Once you know what type of photos you will be taking, look for a camera that is compact, reliable, easy to use and low maintenance. Underwater cameras start at about $50.