Clapper loader
（重定向自Film loader）
![Panavision movie camera. The camera magazine is the lighter color unit on top of the camera, the camera magazine can be removed to be reloaded by the clapper loader](/Images/godic/202501/13/Panavision_movie_camera2107.JPG")
![A short strip of undeveloped 35 mm color negative film, from a roll of film.](/Images/godic/202501/13/35mm-undevel2107.jpg")
![A 35 mm Each reel contains roughly 2,000 feet, or 20 minutes of running time at 24 fps in length.](/Images/godic/202501/13/35mm_cinema_release_print2107.jpg")
![Digital Clapperboard](/Images/godic/202501/13/Clapperboard,_O2_film,_September_20082108.jpg")
A clapper loader or second assistant camera (2nd AC) is part of a film crew whose main functions are that of loading the raw film stock into camera magazines, operating the clapperboard (slate) at the beginning of each take, marking the actors as necessary, and maintaining all records and paperwork for the camera department. The name "clapper loader" tends to be used in the United Kingdom and Commonwealth, while "second assistant camera" tends to be favored in the United States, but the job is essentially the same whichever title is used. The specific responsibilities and division of labor within the department will almost always vary depending on the circumstances of the shoot.