What technique involves a dramatic change in focus from one object to another?

The technique that involves a dramatic change in focus from one object to another is known as Rack Focus. This technique is frequently used in filmmaking to shift the viewer's attention from one subject to another in a seamless manner, enhancing storytelling by directing focus where the filmmaker intends it to be at any given moment.

In practice, Rack Focus can create a strong visual impact, emphasizing the relationship between the two subjects or highlighting specific actions or emotions. For example, during a dramatic scene, a character in the foreground may come into focus while another character in the background gradually blurs out, thereby underscoring the importance of the character who is becoming the focus of attention.

Understanding Rack Focus allows filmmakers to manipulate audience perception and narrative emphasis effectively, making it a powerful tool in visual storytelling.