If an EF lens is not autofocusing correctly with a calibrated camera, the circuitry of the lens itself can be adjusted.
如果EF镜头不能在校准过的相机上正确的对焦，那么就要调整镜头上的电路。
If an EF lens is not autofocusing correctly with a calibrated camera, the circuitry of the lens itself can be adjusted.
如果EF镜头不能在校准过的相机上正确的对焦，那么就要调整镜头上的电路。
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