Firefield Tracker NVGs Night Vision Goggles Gen 1. Firefield Tracker Night Vision Binoculars. Firefield Night Vision Binoculars Tracker is a compact professional device for effective observation in low light conditions, as well as in complete darkness. The device has comfortable central focusing, fixed eye span distance, and infrared illumination. Infrared illumination substantially increases detection range and is necessary for observation in complete darkness. The binoculars are made from two independent image intensifying modules, placed in an one-piece housing made of ...