Depth of field is the range of clear focus in an image or image. It is an important concept in photography or in camera photography.
Depth of field is influenced by factors such as aperture, focus length and shooting distance. Usually, when the aperture is small, the focal length is long, and the shooting distance is far, the depth of field is large (the front and rear scenery are clear), while the depth of field is small (only a specific area is clear, other areas are blurred).
Shallow depth of field is suitable to emphasize the subject, and to blur the background to highlight the theme. For example, portrait photos usually use shallow depth of field to highlight the figure in the background. Instead, large depth of field is suitable for situations that require the entire scene to be clear, such as landscape photography.
In filmmaking, directors and photographers can use different depth of field effects to express different emotional and visual effects. Shallow depth of field can be used to create an intense, focused, or mysterious atmosphere; while large depth of field is often used to display wide, open environments.
In summary, depth of field is the range in which clear focus can be maintained in an image or image. It is influenced by factors such as aperture, focal length and shooting distance, and can be used to create a variety of visual effects and express emotions.