Close-up is the most prominent lens technique in photography or image, which is usually used to express the subject in a particularly prominent way to vividly express the characteristics and details of the subject.

In movies, close-ups can show the actors' expressions, actions and emotions in more detail, thus better conveying the story. In TV series and documentaries, close-ups can highlight the theme and let the audience know the theme more deeply.

In photography, close-ups are often used to shoot the details of objects, such as food, jewelry, handicrafts and so on. To highlight its delicate texture and appearance.

In short, close-ups can give people a shocking and shocking effect visually by magnifying the characteristics and details of the subject, and enrich the visual expression of photography or video works.