What's the difference between home camera tracking and tracking zoom?

That is, on the lens, one is a fixed focus lens and the other is a zoom lens. Home camera tracking is fixed focus _ the head is a lens whose focal length cannot be changed. For example, if you want to shoot something closer, you have to be closer to shoot it. Tracking zoom of home camera is a zoom lens, and the focal length can be changed by using the zoom lever on the camera. For example, if you stand still and want to shoot something far away, you can push the camera up and don't have to get close. The above is the difference between home camera tracking and tracking zoom.