AUTOMATIC FOCUSING DEVICE AND FOCUS ADJUSTMENT METHOD

摘要: PROBLEM TO BE SOLVED: To provide an automatic focusing device capable of improving AF performance even when a subject is low-illuminance one or low-contrast one. SOLUTION: An electronic camera adjusts position focus lens 104 so that evaluated value showing contrast the in range-finding area image may be maximum on basis output signal obtained through photographic optical system including and imaging 108. The sets plurality edge discrimination areas taken by 108, acquires 108 at positions lenses set stores memory. determines whether not as calculation stored value, calculates acquired area. COPYRIGHT: (C)2010,JPO&INPIT