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BI8 binoculars are a device that additionally has a special light-sensitive translucent screen that makes it possible to observe infrared light sources at night. The use of BI8 binoculars to detect infrared searchlights is impractical during fog, blizzard and heavy snowfall. In conditions of heavy haze, rain and snowfall of medium intensity, the maximum detection range of infrared searchlights decreases by 1.5-2 times. When using BI8 binoculars at night with a lot of natural light (full moon on clear nights, "white nights" in the northern regions), the detection range can decrease by 25 - 30%. Light source Charging duration, min. Diffused daylight - 15 Direct sunlight - 7 - 10 Incandescent lamp (ordinary) 100-200 W 7 - 10 Charging the screen beyond the time specified in the table practically does not increase sensitivity and does not lead to damage to the screen. When charging, you should not place the binoculars near an incandescent lamp (100-200 W) or under direct sunlight on hot summer days, as the binoculars may overheat. Which will lead to leakage of sealing putty and violation of the tightness of the binoculars