How does Nikon d3400 shoot background blur?

Nikon d3400 can take the following blurred background photos:

1, shooting with the telephoto end of a medium telephoto or telephoto lens. The longer the focal length, the better the blur.

2. Use aperture priority mode and try to shoot with the maximum aperture.

3. After ensuring the distance needed for composition, the camera should be as close as possible to the characters and as far away from the background as possible.

The background of the camera is blurred, also known as shallow depth of field. It is related to the sensing size, with large sensing area and deep scene. Related to the aperture, the aperture is large and deep. It is related to the focal length, which is long and the scene is deep.