Single-lens reflex camera system.

摘要

An autofocus system of a single-lens-reflex camera (1) system. The autofocusing operation is executed in cooperation with a camera body (1) and a lens unit (2) mounted to the camera body (1). The cooperation is determined by the camera body (1) depending upon the performance of the lens unit (2) mounted thereto. In case the lens unit is equipped with computer means (10, 11) and lens drive means (60, 65), the camera body (1) merely detects a defocus amount and sends it to the lens unit (2), and the focusing operation is then executed by the lens unit itself.