This high-end movie camera responded to demands from many movie lovers. Based on the Auto Zoom 814 Electronic, which sold extremely well in the five years since its introduction, it added the XL function and a film and sound tape synchronized double sound recording system. Its unique shutter opening system had a 220-degree shutter opening for XL shooting, 150 degrees for normal shooting and variable opening control for fading. The lens of the Auto Zoom 814 was improved for better performance, and even one-step smaller aperture was realized. The viewfinder was also improved, adding brightness and precision, to suit XL shooting under dim light conditions. The viewfinder had two times the brightness and more than two times the focusing accuracy of split-image rangefinder of the Auto Zoom 814XL. The sound recording jack was built into the body to enable synchronized sound recording on a tape recorder, generating one pulse signal per frame. An optional synchronization unit attached to this jack and coupled with a tape recorder synchronized recording of the images and the sound became possible.