Minolta
This Maxxum 50mm lens is the first ever real auto focus SLR lens. The Maxxum AF 50mm f/1.7 has center-weighted metering, a body-integral AF system, and full digital computer control. The AF motor is in the camera and drives the lens through a screwdriver connection poking out of the lens mount. The MAXXUM AF 50mm f/1.7 has a life-sensing touch switch: just touch it and the meter wakes up without needing any pressure on the button. Press a little more to turn on and lock AF and press the rest of the way to shoot.
