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最后 ，马达并不只用于镜头自动对焦，还可以用于光圈叶片控制、电动变焦和传感器位移防抖 ：佳能早期DC就有使用超声波马达驱动变焦的产品 ，索尼也曾用环形超声波 、XD马达驱动镜头变焦 。
静安区白银市铜川市