This low poly model is one of the 60+ 3d assets included in the LightArchitect pre-visualization add-on for blender 3d. It is based on the Fisher 10 camera dolly(One of the best cinema dollies in the world and in Hollywood. Fully rigged with standard controls so one can move the dolly as they would in the real world. Perfect for film pre-visualization.
Note that this 3d model is only the dolly and cameras attached. To get the full film pre-visualization add-on use this link: https://www.blendermarket.com/products/lightarchitect---filmmaking-add-on