An auto optical focus detecting device of a camera comprises a center zone being located in a center of a view finder of a camera body; at least two peripheral zones being located in the view finder, one of the two peripheral zones center zone and the other being located in the left-hand side; the camera...http://www.google.com.au/patents/US5291234?utm_source=gb-gplus-sharePatent US5291234 - Auto optical focus detecting device and eye direction detecting optical system
