How does the director use lens movement to influence the mood of the audience?

The function of the follow-up lens is to show the subject in motion continuously and carefully. It can not only highlight the subject, but also explain the direction, speed and posture of the subject and its relationship with the environment. The follow-up lens moves with the subject, forming a modeling effect that the subject is unchanged in motion and the background changes statically, which is beneficial to lead out the environment through the character and follow the follow-up lens from behind the character. Because the audience and the subject have the same viewpoint, they can show a subjective lens, and the subsequent recording of people, events and scenes with the lens is of great documentary significance in the shooting of documentary programs and news. Problems that should be paid attention to when shooting with a lens, keeping up with and catching up with the subject is the basic requirement of shooting with a lens, and following the lens is a shooting method through the movement of the lens. The movement of the lens brings a series of shooting problems such as the change of focal length and shooting angle. The change of incident angle of light is also a problem to be considered and paid attention to when shooting with a lens. Panning refers to changing the shooting mode of the camera optical lens axis with the help of the movable chassis on the tripod or the photographer's own human body when the camera position is fixed. Television pictures taken by panning are called panning.