the instant clip-on design of the camera magazine of the caméflex and later the npr, acl, ex16 and panoram models' coaxial magazines revolutionized filmmaking, in particular documentary films, since magazine changes could now be made in seconds without the need to spend time lacing the film in the camera. the acl model used a focal plane shutter for exposure and a side-to-side oscillating mirror for reflex viewing to keep the camera body size to a minimum