Russian ON-1x20 Night Vision Goggles. ON-1x20 Night Vision Goggles is an optical-electronic device intended for visual observation and identification various objects in night time, as well as for orientation in terrain, operating with documents and carrying on research tasks, appraisal surveys, etc inclusive indoor operations without illumination. ON-1x20 can be refocusing in order to see objects on distance or nearby. In passive mode night goggles is used at natural night illumination intensity from 5 x 10-3 up to 1 lux. Night vision goggles operating ambient air temperature range...