Definition
What is a dolly zoom in video?
A dolly zoom moves the camera toward or away from a subject while zooming the lens in the opposite direction. The subject can remain approximately the same size while the background appears to stretch or compress.
The effect comes from changing camera distance and focal length together, not from a zoom alone. It is often used for revelation, anxiety, or a subjective break in spatial stability.
The move requires measured marks, coordinated dolly speed and zoom timing, and a location with visible depth. Editors usually preserve the continuous shot because cutting into it can weaken the spatial transformation.
Example in the edit
During a sudden realization, the actor stays the same size as the corridor behind them seems to expand.
Why editors use it
It creates a distinctive perceptual effect with real camera geometry, making an emotional moment visually immediate.
Watch and learn
See the technique in context
Selected explanation by StudioBinder
Quick answers
Frequently asked questions about Dolly zoom
Why is it also called a Vertigo effect?
It became strongly associated with the unsettling use of the technique in Alfred Hitchcock’s Vertigo.
Can a dolly zoom be made with a digital crop?
A digital simulation can imitate parts of it, but it lacks the same natural perspective change created by physically moving the camera.
Does the subject have to stay exactly the same size?
No, but maintaining similar framing makes the background transformation most apparent.