Film cameras

The movie camera, film camera or cine-camera is a type of photographic camera which takes a rapid sequence of photographs on an image sensor or on a . In contrast to a still camera, which captures a single snapshot at a time, the movie camera takes a series of images; each image constitutes a "frame". This is accomplished through an intermittent mechanism. The frames are later played back in a movie projector at a specific speed, called the frame rate (number of frames per second). While viewing at a particular frame rate, a person's eyes and brain merge the separate pictures together to create the illusion of motion.

Since the 2010s, film-based movie cameras have been largely replaced by digital movie cameras.

An interesting forerunner to the movie camera was the machine invented by Francis Ronalds at the Kew Observatory in 1845. A photosensitive surface was drawn slowly past the aperture diaphragm of the camera by a clockwork mechanism to enable continuous recording over a 12- or 24-hour period. Ronalds applied his cameras to trace the ongoing variations of scientific instruments and they were used in observatories around the world for over a century.

In 1876 Wordsworth Donisthorpe proposed a camera to take a series of pictures on glass plates, to be printed on a roll of paper film. In 1889 he would patent a moving picture camera in which the film moved continuously. Another film camera was designed in England by Frenchman Louis Le Prince in 1888. He had built a 16 lens camera in 1887 at his workshop in Leeds. The first 8 lenses would be triggered in rapid succession by an electromagnetic shutter on the sensitive film; the film would then be moved forward allowing the other 8 lenses to operate on the film. After much trial and error, he was finally able to develop a single lens camera in 1888, which he used to shoot sequences of moving pictures on paper film, including the Roundhay Garden Scene and Leeds Bridge.

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