| 摘要 |
A camera system is provided to achieve an improvement in start-up performance during an AF operation to thereby allow correct photography even in a camera system in which the dual-motor-compatible interchangeable lens is mounted to a camera body. A camera system comprises a camera body(1), an interchangeable lens(2), a focusing mechanism(3), a rotational force transmission device, an auto-focusing mechanism(4) and a one-way clutch(44). The camera body has an in-body motor(112). The interchangeable lens has an in-lens motor(43), the interchangeable lens being detachable from the camera body. The focusing mechanism moves a focusing lens group(FL) provided in the interchangeable lens in an optical axis direction thereof. The rotational force transmission device transmits rotational force of the in-body motor to the focusing mechanism to perform an AF operation in a state where the interchangeable lens is attached to the camera body. The auto-focusing mechanism drives the focusing mechanism to perform the AF operation by the in-lens motor, independently from the in-body motor. The one-way clutch allows transmission of rotational force of the in-body motor to the in-lens motor while preventing rotational force of the in-lens motor from being transmitted to the in-body motor.
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