This paper presents the design and performance of Cincinnati Electronics newest portable infrared imaging system, the NightMaster. The system incorporates a number of advanced features to achieve low power, compact size, and high system magnification, while maintaining the exceptional thermal sensitivity of other Cincinnati Electronics focal plane array (FPA) based imager products. The sensor assembly is a 256 X 256 MWIR Imager Antimonide (InSb) staring FPA, integrated to a low power, high reliability microcooler. Some of the system features include: a lightweight, f/4 50 mm/250 mm dual field of view telescope assembly, low power analog electronics, `on demand' digital electronics for `field' calibration using internal thermal sources, 12-bit real time digital data output, and RS-422 serial interface for full remote control capability. These and other features and performance data will be described.