What factors are related to the depth of field in photography?

The main factors that determine the depth of field are aperture, focal length and object distance.

1, aperture: the larger the aperture, the smaller the depth of field; The smaller the aperture, the greater the depth of field.

2. Focal length: The longer the focal length, the smaller the depth of field; The shorter the focal length, the greater the depth of field.

3. Object distance: The farther the distance, the greater the depth of field; The closer the distance, the smaller the depth of field.

When shooting, the process of adjusting the camera lens to make the scene clear at a certain distance from the camera is called focus, and the point where the scene is located is called focus, because "clarity" is not an absolute concept.

Therefore, the scene imaging within a certain distance before and after focusing can be very clear. The sum of the front and back ranges is called the depth of field, which means that as long as the scenery in this range can be photographed clearly.

Extended data

Depth of field effect:

① Show the depth of the subject (sense of hierarchy)

Depth of field can enhance the sense of depth and space of the picture. For example, in the following photo, the objects are on the same parallel line, and the objects are regularly arranged at different distances, showing the difference in size and realism, which makes the sense of space and depth of the picture very strong.

2 highlight the main body.

Highlight the subject, which should be the most popular depth of field function. When the background of the picture is messy and the main body is not prominent, the picture taken in this way will definitely have no aesthetic feeling. However, shallow depth of field is used to blur the background, thus effectively highlighting the subject.

Baidu encyclopedia-depth of field