Movie cameras shouldn't be confused with video cameras as they are two different types of camera. A movie camera takes a rapid sequence of photographs on film. When the film is developed it can be projected as a motion picture. Whereas still cameras take shots one at a time, movie cameras takes a series of shots, each called a frame.
A movie camera is able to do this because of a mechanism, called the movement. The recorded frames can be played back later at a specific speed by a movie projector. The speed projected is called the frame rate, meaning the number of frames per second. This gives the images the illusion of motion.
Most optical and mechanical elements of movie cameras are also present in movie projectors. The camera doesn't possess an illumination source and it contains the film stock in a light-tight unit. Movie cameras also enable you to control the exposure by an iris aperture. There are different types of film formats for movie cameras and various styles of cameras available. Film cameras don't record sound as the audio is recorded separately by a precision audio device.