Projectors for film and television studios, stage and photographic use – Part 1: Projectors for incandescent lamps, consumption 0.25 kW to 20 kW and for metal halide lamps, consumption 0.125 kW to 18 kW; Optical systems, equipment
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 08/01/2003
