You will notice quite a difference with the number 3. It is so close that even though the parallax adjuster might show that you have the subject in the frame, the angle of view is much different from top lens to bottom lens. So you get a different perspective than you think and the background is very different than what you see in the viewer as well. If you happen to have the plate back and the ground glass insert you can see exactly what the taking lens sees but then you have to shoot with the sheet film holders. If you use your camera on a tripod you can make a little parallax adjustment with the center column or you can at least stand back an look at the camera in relation to the subject adjust it to where you think it should be.