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Camera moves & transitions · #09
Rack focus
Shift focus between near and far. The camera does not move; focus shifts from a flower in the foreground to a person behind it, swapping which one is blurred.
Shooting Style & Timerack focusfocus pullpull focusdepth of fieldblurbokehforeground
Full motion specification
How the movement works
To move attention from foreground to background (or back) without cutting.
- 01Camera: position, direction and focal length all fixed (height 1.1 m); only the blur amounts change
- 02Blur: the foreground flower (0.75 m left, 2 m away) goes 0 px → 7 px; the person and background (person 0.9 m right, 9 m away) go 6 px → 0 px; the ground grid uses 0.6× the background blur
- 03Timing: 1.0 s to 2.6 s (1.6 s), cubic ease-in-out (about cubic-bezier(0.65,0,0.35,1))
- 04Focus marker: blue corner brackets travel in a straight line from the flower to the person, half-width shrinking 46 px → 30 px
- 05Subject: neither the flower nor the person moves
- 06Return: hold 2.6–4.2 s, then cross-fade back over the last 0.5 s; top-right readout shows focus distance (◎ 2m → ◎ 9m)
Prompt
Rack focus from the cup in the foreground to the person behind it, in 1 second.