Patent ID: 6853502

Claim:
A lens system which is adapted to allow manual focus adjustment for manually executing focus adjustment of a taking lens by manually operating an operation member and auto-focus adjustment for automatically executing focus adjustment of the taking lens according to information concerning a subject of shooting, comprising: a continuous AF execution device which continuously executes the auto-focus adjustment; an AF start switch through which start of continuous execution of the auto-focus adjustment by the continuous AF execution device is instructed; an AF mode switch through which one of a first and second AF mode is chosen; first AF processing device which, where the first AF mode is chosen through the AF mode switch, when start of execution of the auto-focus adjustment is instructed through the AF start switch, starts execution of the auto-focus adjustment by the continuous AF execution device, when the operation member for manually executing focus adjustment is operated during continuous execution of the auto-focus adjustment by the continuous AF execution device, switches focus adjustment of the taking lens from auto-focus adjustment to manual focus adjustment and makes manual focus adjustment valid until start of execution of the auto-focus adjustment is instructed through the AF start switch; and a second AF processing device which, when the second AF mode is chosen through the AF mode switch, when the operation member for manually executing focus adjustment is operated during continuous execution of the auto-focus adjustment by the continuous AF execution device, switches focus adjustment of the taking lens from auto-focus adjustment to manual focus adjustment and makes manual focus adjustment through the manual operation member valid, when operation of the manual operation member is stopped, automatically switches focus adjustment of the taking lens from manual adjustment to auto-focus adjustment by the continuous AF execution device.