A round track for a camera dolly is a circular path or loop that allows a camera dolly to move smoothly and precisely around a set or location. The track is typically made of metal or plastic and consists of several sections that can be joined together to create a complete loop.

The track is usually mounted on a set of wheels or rollers, which allows the camera dolly to move smoothly around the loop. The wheels or rollers are typically made of a hard material such as steel or plastic to ensure a smooth and stable ride.

The track may also be equipped with a number of additional features, such as locking mechanisms to prevent the camera dolly from moving when not in use, adjustable feet to level the track on uneven surfaces, and track extensions to increase the length of the loop.

Round tracks for camera dollies are commonly used in film and video production, where they allow filmmakers to capture smooth, sweeping shots that would be difficult or impossible to achieve with a handheld camera. They are also used in photography and other applications where a stable, precise camera movement is required.