Generally, a shooting starting point exceeds 10s.

The content of the camera from the first turn-on to the turn-off is a shot. Generally, a shot that lasts more than 10 second is called a long shot.

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The appearance of long shots with aesthetic significance is considered as "the revolution of film aesthetics". Prior to this, montage theory, as the only film theory, basically dominated the thinking activities of film artists.

People seldom study the relationship between film and photography, and seldom study the characteristics of film from this angle.

Bazin is unconventional, attributing the characteristics of the film to photography, and from this characteristic, emphasizing the realism and documentary sense of the film. Bazin's realistic aesthetic thought, as well as his aesthetic function of depth-of-field lens and long lens, greatly promoted the development of film language, brought about the revolution of film expression means and created a new screen form. In a sense, without long shots, there would be no modern movies.