A clap boy or clapper-boy is a defunct movie industry profession. This person loaded film into and out of film magazines in cameras in early filmmaking. For other uses see film (disambiguation) Film refers to the celluliod media on which movies are printed Film — also called movies, the cinema, the silver screen, moving pictures, photoplays, picture shows, flicks, or motion pictures, — is a field that encompasses motion pictures as an art form or as part of... Films are produced by recording actual people and objects with cameras, or by creating them using animation techniques and/or special effects. ... A camera is a device used to take pictures (usually photographs), either singly or in sequence, with or without sound recording, such as with video cameras. ...

The most up-to-date job title for someone doing this is second assistant camera (2AC). The job is an important one in the scheme of things as the 2AC's function is to assist the first assistant camera at all times as well as operate the zoom action for the camera operator during shots. For all that, 2ACs are the lowest person on the camera-crew totem.

In many parts of the English speaking world, the terms focus puller and clapper loader are still applied and credited for first assistant camera and second assistant camera (respectively). In cinematography, a focus puller or first assistant camera (1 AC) is the member of a film crew responsible for keeping the cameras focus right during a shoot. ... A clapper loader is part of a film crew, whose primary task is to operate the clapboard (slate) at the beginning of each take and to load the raw film stock into camera magazines. ...

See also: Film crew Film crew and equipment on a location shoot. ...