| 摘要 |
PURPOSE:To eliminate the resonance of a vibration detector by setting the resonance frequency band of the detector and the resonance frequency band of the motor in separate bands. CONSTITUTION:An ultrasonic motor 5 is provided at a photographing lens 3, and a vibration detector 8 is provided at the lens 3 (or a camera body 1). A setter 9 sets the resonance frequency band of the motor (a drive source for matching a focus of the lens 3) 5 and/or a drive control range and a primary or secondary resonance frequency band and/or first or second resonance half- value band of the detector (blurring detecting sensor) 8 in separate bands. Thus, the detector is not resonated by the vibration of the motor 5, and an accurate vibration can be detected. |
