Why should low-distortion lenses be used for online teaching lenses?

Part of it is to reduce the chromatic aberration, and the other is to prevent distortion (distortion).

The lens has two fingers in film and television. One refers to the optical components used by movie cameras and projectors to generate images, and the other refers to a continuous picture captured from startup to shutdown, or between two editing points. A segment of time is also called a shot.

The shot is the basic unit that makes up the entire film. Several shots constitute a paragraph or scene, and several paragraphs or scenes constitute a film. Therefore, the lens is also the basic unit of visual language. It is the basis of narrative and representation. In the early shooting of film and television works, the shot refers to the sum of a period of footage taken continuously by the camera from startup to stillness; in post-editing, the shot is a group of images between two editing points; in the finished film, a A shot is a complete segment from a previous optical transition to a subsequent optical transition.