Zolly

Another, though less common, use of depth of field can be found in the zolly, or zoom-with-a-counter-dolly shot. In this camera move, the characters or object being viewed will often stay the same relative scale while the lens length changes.

In Jaws, Spielberg used the zolly effect when Brody witnesses a little boy eaten by the shark. Brody is sitting on the beach and as the camera dollies toward him, the zoom lens is pulled back.