LUMI H35R Rangefinding Compact Thermal Monocular 2.5X 640x512 35 mm LRFLUMI brings the power of thermal observation devices to a compact and user friendly form factor for hunters on the go. The LUMI series of handheld thermal monoculars features a high quality thermal sensor, available in 384x288 (L models) or 640x512 (H models) paired with a 1024x768 AMOLED display. Available models offer either a 2. 5x base magnification (H models) for a wider field of view, or a 4x base magnification (L models) for identifying targets