Mechanical or digital slowing of motion — dolly, crane, gimbal stop smoothly, never jerky. Critical for fluid moves and clean exit from camera paths.
Deceleration / Brake
When dollying, you don't just stop – you decelerate. That's the difference between professional camera movement and amateurish jerking. Deceleration is the controlled slowing down of a camera movement, whether on a dolly, crane, or gimbal. It determines whether a movement fades out elegantly or if the viewer perceives an annoying stop-jerk. Pure speed is less valuable than clean deceleration – this is one of the first lessons in grip training.
Technically, on a mechanical dolly, this works via the chassis brakes. The grip must learn not to stop abruptly, but to continuously reduce speed over the last two to three meters. On motorized dollies, this is controlled via the motor's speed itself – a smooth reduction, not a full brake alarm. On a crane (or jib), you work with hydraulics and counterweights: a good crane operator "feels" the end of the movement in advance and compensates for it before the arm comes to a standstill. With a gimbal, deceleration is a software matter – pan and tilt run via firmware curves that are pre-programmed or fine-tuned live with potentiometers.
On set, this looks practically like this: the shot list has a close-up dolly-in before an actor scene. The first second: normal travel speed. From 2 meters before the final position, the deceleration begins – slowing down linearly, not with a step. This way, the camera reaches the exact final position with zero speed, focus is ready, no "sick" moment. The opposite is the common mistake: full speed up to a mark, then full braking – in the cut, it looks cheap, the movement appears uncontrolled.
Deceleration is also communication: the 1st AC (focus puller) needs a predictable movement to pull focus – precisely why a smooth deceleration is indispensable. Reverse is more complex: with a dolly-out, deceleration begins later because the final position is less critical than when dollying in. Important: deceleration != standstill. The movement must not simply stop – it must fade out. In the final cut, this is evident in the stillness of the frame and the visual serenity of the composition.