... transmission. A wide field of view of about 200 feet at the distance of 220 yards makes ... lens diameter,mm44 50 60Lens system59mmF/1.2 88mmF/1.2 100mmF/1.2FOV at distance 200yards,ft/ ... 118/36Focus range,yards1.5 to infinity 1.0 to infinity 1.0 to infinityEye relief distance,mm 15Dioper setting, ... 70Operating temperature, -30°to+45°Storage temperature, 0°to+60° Water instrusion Meet IPX4 rating Humidity,% ...