Canon New FD 35-70 mm f/4 AF
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The Canon FD 35-70mm AF lens of 1981 was Canon's first attempt at adding autofocus capability to their range of single-lens reflex cameras. Canon took their existing, successful Canon FD 35-70mm f/4 lens and added a box above the lens containing a self-contained autofocus mechanism, Canon's SST (Solid State Triangulation) system, as used in the AF35ML compact camera earlier that year.
Uniquely, this lens provided autofocus capability fitted to any Canon FD-mount camera—it did not require any capabilities in the camera body. The photographer simply had to push a button on the lens for it to focus automatically.
