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A camera is a series of mechanisms whose functions are to focus the image reflected by the objects to be photographed and allow the light entering a dark room through a small hole on the opposite wall produces an image reflected. Applying this principle, it is possible to build a simple camera with a pinhole opening. The light coming through this small opening, forming an image of little clarity on the inner wall opposite to that found in the hole.

The approach is improved by replacing the pinhole opening a converging lens placed at a certain distance to the plane of the image.

The cameras we are accustomed to today, instead of the hole, have a lens with a lens. The current cameras are composed of a diaphragm to regulate the amount of light reaching the film and a shutter that determines the exposure time.

Phanoramic Cameras

The panoramic cameras have mechanisms circular rotation for both the target and the entire chamber, reaching 360 degrees.

Plasmans are the entire image on a long strip of film 24x224 mm, universal format. They produce real panoramas. They use a higher frame width after exposure the film moves synchronized with the rotation swivel of the camera, doing a sweep on the film.

These cameras are specialized application for professional photographers. Currently there are very few laboratories that back negative so long, and few projectors for slides of this size.

The 35-mm SLR camera is capable of making five different types of photography, panoramic, linear, rotary motive, ethereal and photofinishing.

Underwater Camera

Cameras are sealed with a strong structure to withstand water pressure. Some of these cameras offer a selection of boxes that are underwater submersible to the equivalent depth of 40 meters. These boxes are constructed of polycarbonate, to allow the camera to firmly resist the bumps and jolts on the mainland.

They are equipped with a reflex viewfinder. The focus of their goals are shorter to compensate for the increase caused by the refraction of water.

The controls of these types of cameras are large, to make them more visible and legible underwater.