How to divide the zoom of the camera for monitoring,

When you say zoom, you mean zoom range.

Commonly used are

16x optical zoom f = 4.0-64.0mm 8 times electronic amplification

26x optical zoom f = 3.5-9 1.0mm 10x electronic amplification.

Optical zoom refers to enlarging and reducing the size of the scene to be shot on CCD or CMOS by moving the lens.

As for electronic zoom, it refers to the function of the camera. In fact, electronic zoom is pixel magnification.