| 摘要 |
A lens driving device for driving a focusing lens of a photographing lens for a camera is provided with a focusing ring that is rotated to move the focusing lens, an AF motor and an MF (manual focusing) ring. Each of the AF motor and the MF ring is connected to the focusing ring to rotate the same. The AF motor is driven to rotate. The MF ring is operable even when the AF motor is rotated. The device is further provided with a first detector that detects a driving amount of the focusing lens, a second detector that detects a driving speed of the AF motor, and a speed controller that controls a driving speed of the AF motor in accordance with detection outputs of the first and second detector.
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