Clapper Loader (US: 2nd Assistant Camera- 2nd AC
This person works on a film set as a member of the camera team. Their main function is to load raw film stock into the camera film magazine, operate the clapperboard or slate at the beginning of each take, marking actors as needed, and handling all the paperwork for the camera department. These functions may vary from film to film and country to country. In the US for example this position is known as the Second Assistant Camera or 2nd AC.