The manuallens setting at the installation site of the camera is not required.
该摄像机不需要手动镜头设置功能。
2
The same as the above principle, we shouldn't suggest use focal variation manuallens for avoiding calculation adjustment error brings from the AS function.
同上条原理，为避免AS功能带来的计算校正误差，不建议使用变焦手动镜头。
3
If all these approaches are impractical, one could always resort to manual focus using distance markings on the lens.