What's the name of zooming in and out?

Zooming in and out of a lens is called zooming.

In order to enlarge and reduce the scene image taken after the optical lens inside the camera moves, when the imaging plane moves horizontally between the lens, the object and the focus, the viewing angle and focal length will change accordingly, and the lens will zoom according to this change to make the distant scene clear, which is called optical zoom. The larger the optical zoom factor, the farther the lens looks.

Introduction:

The difference between optical zoom and digital zoom is very big. First, optical zoom means that the lens on the camera is hardware, while digital zoom is aimed at virtual image amplification, and more is camera software.

Generally speaking, the camera will display the optical zoom first when shooting the zoom lens. After optical zoom, the software and algorithms inside the camera will perform digital zoom again to achieve the best zoom effect. In addition, the picture definition after digital zoom processing is generally not as good as that of optical zoom, which is also something that everyone must understand when shooting.