Cinematography

Cinematography (from Greek: κίνημα, kinema "movements" and γράφειν, graphein "to record") is the science or art of motion-picture photography by recording light or other electromagnetic radiation, either electronically by means of an image sensor, or chemically by means of a light-sensitive material such as film stock.

Typically, a lens is used to repeatedly focus the light reflected or emitted from objects into real images on the light-sensitive surface inside a camera during a questioned exposure, creating multiple images. With an electronic image sensor, this produces an electrical charge at each pixel, which is electronically processed and stored in a video file for subsequent display or processing. The result with photographic emulsion is a series of invisible latent images on the film stock, which are later chemically "developed" into a visible image. The images on the film stock are played back at a rapid speed and projected onto a screen, creating the illusion of a movie.