What is the depth of field of the camera?

The depth of field refers to the distance range that an object measured along the axis of the imaging depth of field machine can obtain a clear image in front of the camera lens or other imagers.

When the lens of a camera is clearly focused on an object, all points on the same plane perpendicular to the lens axis can form a clear image on the film. The distance between all the scenes before and after this plane is called the depth of field of the camera.

Extended data

Three elements of camera depth of field:

1, camera aperture

The relationship between aperture and depth of field is that aperture is large, depth of field is small, aperture is small and depth of field is large. When we shoot static images such as flowers, trees or people, we often choose a small depth of field, which can better express the subject, and a large depth of field is often used to shoot landscapes.

2. Lens focal length

Its relationship with depth of field is long focal length, small depth of field, short focal length and large depth of field. When using short focal length, the background blur will have obvious effect, which is suitable for shooting majestic mountains and vast grasslands; The long focal length is suitable for shooting portraits, which is convenient for blurring the messy background.

3. The distance of the subject

Refers to the distance between the lens and the subject. The depth of field can be changed by changing the distance of the subject. The subject near the lens has a small depth of field, while the subject far away from the lens has a large depth of field.