Shooting skills? I have seen a picture of a cup. Only the cup is clear and the surrounding environment is vague.

The shooting technique is depth of field.

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

Aperture, the distance between the lens and the subject are important factors affecting the depth of field;

1, lens aperture:

The larger the aperture, the shallower the depth of field; The smaller the aperture, the deeper the depth of field;

2. Lens focal length:

The longer the focal length of the lens, the shallower the depth of field; The shorter the focal length, the deeper the depth of field;

3. The distance between the subject and the background:

The farther the distance, the shallower the depth of field; The closer the distance, the deeper the depth of field;

4. The distance between the object and the lens:

The farther the distance, the deeper the depth of field; The closer the distance (not less than the minimum shooting distance), the shallower the depth of field.

Baidu encyclopedia-depth of field