Released in 1985, the Canon T80 was Canon’s first SLR with an integrated autofocus system. While it retained the classic FD mount, autofocus was made possible through special AC (Automatic Computing) lenses, which featured a built-in focusing motor.

One such lens is the Canon AC 35-70mm f/3.5-4.5, a compact standard zoom with a unique design—on the right side, there’s a noticeable bulge housing the autofocus motor. This system was an interesting transitional step before Canon introduced the revolutionary EOS system and EF mount in 1987, where autofocus motors were placed inside the lens itself.

🔹 Canon T80 Specifications:

• 35mm SLR with electronic program controls
• FD mount, but compatible only with AC autofocus lenses
• Three autofocus modes (single, continuous, and manual)
• Programmed automatic exposure modes
• Powered by 4x AAA batteries

🔹 Canon AC 35-70mm f/3.5-4.5:

• Standard zoom lens
• Maximum aperture: f/3.5 (35mm) – f/4.5 (70mm)
• Autofocus system with a built-in motor
• Canon’s first autofocus zoom lens

Although it quickly became obsolete with the arrival of the EOS series, the T80 and AC lenses are now collectible rarities and a fascinating part of photography’s evolution. This model showcases how major camera brands experimented during the transition from manual focus to fully electronic autofocus systems.