Is it necessary to buy an automatic tracking camera bracket for mobile phones?

This is necessary. Automatic tracking and shooting will automatically find the right position with the movement of the human body.

Tracking shooting method refers to moving the camera horizontally at a uniform speed when shooting, so that the shutter motion and the athlete motion are within the same included angle, thus forming a special effect of dynamic solidification of the shooting subject and blurring of the background.

There are generally two ways to track shooting, the camera moves up and down or the photographer follows the motion of the subject himself. In actual photography, there are more practical lens movement tracking. The way a photographer follows the subject is like installing a track when shooting a movie or shooting in parallel in a car at the same speed, which is generally less used in actual photography.