Hello,
found this at http://www.syopt.com/en/camera/photo-lenses-14mm-F2.8-ED-AS-IF-UMC.php
"An aperture control motor and CPU chip is installed within 14mm F2.8 ED AS IF UMC Canon AE lens to assist Auto Exposure(AE) for Canon cameras. The aperture can be controlled from camera body thanks to the motor and chip. Also the appropriate focus is guided with indicator light."
Thought it was intersting. No more gluing a Chip to the lens for focus confirmation and you get your EXIF data as well.
Bigdaddy
found this at http://www.syopt.com/en/camera/photo-lenses-14mm-F2.8-ED-AS-IF-UMC.php
"An aperture control motor and CPU chip is installed within 14mm F2.8 ED AS IF UMC Canon AE lens to assist Auto Exposure(AE) for Canon cameras. The aperture can be controlled from camera body thanks to the motor and chip. Also the appropriate focus is guided with indicator light."
Thought it was intersting. No more gluing a Chip to the lens for focus confirmation and you get your EXIF data as well.
Bigdaddy