The Canon AT-1 is a 35mm FD-mount single-lens reflex camera manufactured by Canon of Japan from December 1977. It was produced purely for export and was never sold in the home Japanese market. It was a version of the popular AE-1 but without the shutter-speed priority auto-exposure mode of that camera. The AT-1 featured manual exposure only. A light meter was included, featuring TTL center-weighted average metering with a CdS photocell, and a match needle in the viewfinder. It comes with 4SR44 6V battery.