Traditionally, a tracking shot was achieved by mounting the camera on a wheeled camera stand called a dolly and for that reason these shots are also sometimes called dolly shots. Nowadays ...
Professional camera gear is expensive ... and are easy to mount. He’s created a dolly for them using a T-strap bracket, which is used for wood framing — the wheels mount directly to it ...
[Brian Grabski] was asked by a friend to design and build a dolly that would move a camera during a time-lapse sequence. Above you can see the product of his toils, and the videos after the break ...