Arnold Richter KG. Largest manufacturer of professional motion picture equipment, film cameras (16, 35, and 65/70 mm) and cinematic lighting equipment in the world; named after founders August Arnold and Robert Richter; 1937 the Arri Group introduced the world's first reflex mirror shutter in the Arriflex 35 camera, an invention of their longtime engineer Erich Kaestner; Arri also specialized in manufacturing light-weight and portable cameras for both news and war photography, as well as feature film production in the 1960's which saw an increase in shooting on location rather than in a studio; Arri Camera lenses are manufactured by Carl Zeiss group.