Rack focus移焦／焦点转移

How it works

Shift the sharp focus plane between depth targets.

Terminology boundary: Aliases vary by region and production context; the physical parameter above is the deciding clue.

Narrative effect

Redirects attention without moving or cutting.

When to use it

Clues, near-to-far reveals, dialogue power shifts.

Common mistakes

Name both targets and create enough depth separation.