Clapper loader

Clapper loader operating the clapperboard during the filming of A Place in the Caribbean (2017, Honduras)

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.[1]

Panavision R-200 movie camera (through-the-lens Reflex, 200 degree shutter, hence R-200). The camera magazine is inside the lighter color "blimp" on the top of the camera; the camera head is inside the darker color "blimp" on the bottom; the camera magazine can be removed to be reloaded by the clapper loader
A strip of undeveloped 35 mm color negative film from a roll; B&W negative film is similar; "Negative" may be inferred from the BH style perforations.
  1. ^ Filmproductionroles.com clapper loader