How to take photos of depth of field

Keep the camera as close as possible to the subject, shoot with the telephoto end of the lens, shoot with a large aperture, and use larger imaging equipment, that is, the size of ccd or the size of film. There are two factors that affect the depth of field, aperture and focal length. In other words, the aperture is small and the focal length is small. Even with wide angle and small aperture, the shutter speed is slow, and a tripod is needed.

Depth of field refers to the range of the distance between the front and back of an object measured by imaging in front of a camera lens or other imager. Aperture, lens and object distance are important factors affecting depth of field.

After focusing, the range before and after focusing, that is, the clear image presented in the range of front and rear distance, is called depth of field. There is a certain length of space in front of the lens (before and after focal length adjustment). When the subject is located in this space, its imaging on the negative is just between the two diffusion circles before and after focusing. The length of the space where the subject is located is called the depth of field. In other words, the blur of the image presented by the subject on the negative plane of this space is within the limited range of the allowable circle of dispersion, and the length of this space is the depth of field.