Over the years, film cameras have changed more on the outside than the inside.
A film camera still operates on the same basic optical properties that the first models did in the first half of the 19th century. The one major development has been the innovative design of the single-lens reflex (SLR) camera, which includes an interior mirror.
Film Advance
The first cameras could hold only one piece of film at a time, but since the creation of roll film, all film cameras need a film advance system. This interior apparatus usually consists of two spools, one at each side of the inside of the camera. The spools are needed to move the film forward after an exposure has been made.
Shutter Mechanism
The shutter mechanism remains closed most of the time. When a picture is taken, the shutter is opened for a brief span of time, allowing light to expose the film. Modern shutters can be adjusted for the size of the opening, as well as the duration the shutter remains open. In many cameras, the shutter is located right behind the camera lens.
Single Lens Reflex Cameras
The newest innovation is the movable mirror that can be found in all SLR cameras. When not in use, this rectangular mirror sits between the lens and the film. The shutter has also been modified, so the person behind the camera can look through the lens during the viewing process. When the picture is taken, the mirror must first swing up, and then a sliding shutter, located near the rear of the camera, allows light to expose the film.
Tags: behind camera, expose film, film cameras, light expose, light expose film, picture taken
