The FLIR ThermoSight T50 from US Night Vision Corp. is a 320 by 240 advanced thermal weapon sight built for target acquisition, covert operations and surveillance. Designed to interface with standard day optics, the ThermoSight T50 maintains boresight and reticles remain calibrated. The unit can be used as a thermal weapon sight mounted on a Picatinny rail or as a handheld imager. The longwave thermal imaging sensor provides the user will a crisp image in extreme darkness, smoke, fog and many other atmospheric conditions.