What is the definition and function of a long lens with depth of field? (Please give an example)

Depth-of-field long lens: It is a kind of long lens with deep focal length. It is a means to realize the picture scheduling of the distant scene.

This kind of lens is often used to keep the integrity of the picture and the unity of time and space.

Its functions are:

A it can express complete actions and events with one shot, and its meaning can exist independently, independent of its connection with the front and back shots.

B emphasize the continuity of the long lens in time and the function of the complete space brought by the deep focal length, and form several planes that set off each other and interact with each other.

Compare the spatial structure of complex images

C. Because of this multi-faceted and multi-faceted picture, fuzziness is derived, which gives people considerable freedom of choice when enjoying movies.

And freely make your own judgment and understanding of part or all of the meaning of the image.