C CineCards AI
Lens / Optics Foundation Beginner

Rack Focus

Shifts focus from one subject plane to another during the shot.

Why it matters

It guides attention without cutting.

When to use

  • Reveals
  • Dialogue focus
  • Product detail
  • Story clues

Human shoot hint

Set two focus marks and rehearse the shift before recording.

AI prompt template

cinematic rack focus from foreground to [subject], shallow depth of field, [duration]

Preview prompts

previewVideoUrl: null

rack focus from blurred foreground to [subject], soft light, 3 seconds

Common mistakes

  • Focus lands on the wrong object
  • Too many focus changes