What is the function of a dolly in video production?

The function of a dolly in video production is to create smooth camera movements by supporting the camera and allowing it to roll along a track. This equipment is specifically designed to facilitate dynamic shots, such as tracking movements where the camera moves in relation to the subject, or traveling shots where it glides smoothly across a scene. The dolly helps in achieving a professional look, as it minimizes the chance of shaky footage, which can detract from the visual quality of the production.

In contrast, static shots without movement do not utilize a dolly, as it is meant for movement-based cinematography. Adjusting depth of field is achieved through lens adjustments rather than camera movement. Similarly, headroom refers to the framing used around the subject, which is more about composition than the functionality provided by a dolly.