What does rack focus involve?

Rack focus involves changing the focus of a lens during a shot, which is an essential technique used in film and video production to direct the audience's attention. By shifting the focus from one subject to another within the same frame, filmmakers can convey important narrative information, highlight different elements in a scene, or create a more dynamic storytelling experience. This technique allows for a visual emphasis on characters or objects, enhancing the overall storytelling and emotional impact of the scene.

In contrast, stabilizing camera movement focuses on ensuring the shot remains steady and free from unwanted shaking, while enhancing color and reducing light exposure are post-production or lighting techniques that deal with the visual quality of the image rather than the focal depth during a shot.