Printer-friendly versionOften there is a first and second assistant cameraman. The first assistant cameraman is generally responsible for the maintenance of the camera. The first assistant cameraman also changes lenses, maintains focus during shots, marks the spots where actors will stand and measures the distance between the camera and the subject matter. The second assistant cameraman fills out camera reports and is often responsible for loading and unloading camera magazines, which contain the film. Also see film loader.