Help ~ photography problem: how to take three photos with different depth of field? (from the same scene)

The factors affecting the depth of field are: aperture, focal length, the distance between the subject and the background, and the distance between the camera and the subject.

You can use aperture priority mode, which makes it easier to adjust the aperture. The larger the aperture, the shallower the depth of field.

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In order to make all three boxes clear, you need a large depth of field. You can use an aperture between f8 and f 16, and try to use a short focal length. It is easy to get clear results from far and near.

Only one box needs a shallow depth of field, use the maximum aperture of the lens, put the three boxes farther away, use a long focal length when shooting, and keep the camera as close as possible to the subject.

As for the clarity of the two boxes, this effect is between the above two. You can get good results by adjusting the relevant parameters such as aperture and focal length yourself.