(Last edited: Tuesday, 30 July 2013, 5:41 PM)
in shooting, the number of frames exposed per second; in projection, the number of frames thrown on the screen per second. If the two are same, the speed of action appears normal while a disparity will create slow or fast motion. The standard rate in sound cinema is 24 frames per second for both shooting and projection (for silent film, it used to be between 16 and 18 frames per second.)