Depth of field is the 'distance between the nearest and furthest objects that give an image judged to be in focus in a camera'. Aperture is an opening hole or a gap. Aperture relates to depth of field because to make the picture have a depth of field, you have to have an aperture to make the person's eye look towards the subject of the picture. In this picture the depth of field is near because the light is close to the camera.