What is the function and significance of the long lens?

Long shot is a shooting technique, which refers to the time interval between the starting point and the end point of shooting, that is, the length of the film fragment.

It refers to shooting a scene and a scene continuously for a long time (some as long as 10 minutes) to form a relatively complete lens paragraph. As the name implies, it is a shot that takes up a long film for a period of time. This naming is mainly symmetrical with respect to short shots. 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.

Function: reproduce the original appearance of space; Show grand scenes and broad environment; Clear the mood and atmosphere. Narrative technique of long lens: Long lens pays attention to scene scheduling in space construction, and replaces fixed lens with depth of field lens in lens structure, which leads to its long lens use time, which is what we often call long lens narrative technique. The narrative technique of long shots can be said to be the typical style and characteristics of documentaries.

Definition of long shot: Long shot is a shooting technique, which is relative to montage shooting method. The "long lens" here does not refer to the length or focal length of the physical lens appearance, nor to the distance between the photographic lens and the shooting object, but to the time distance between the starting point and the end point of shooting, that is, the length of the movie fragment.