What is the difference between depth of focus and depth of field in photography?

The depth of focus refers to the distance that the focus can move along the optical axis of the lens on the premise of keeping the image clear. Inversely proportional to the aperture; Distance is inversely proportional; The focal length of the lens is proportional. The focal depth refers to the distance that the focal plane of the image is allowed to move. The depth of field is aimed at the clear range where the subject can be recorded. The depth of focus is largely related to the manufacture of the camera, and the depth of field is largely related to the reproduction of the subject.