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Originally Posted by TteFAboB
Quote:
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Originally Posted by bradclark1
Quote:
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Originally Posted by TteFAboB
Why so much night-vision? Isn't it easier to spot the dark tanks against the light background?
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It's not a night-vision sight its a "Thermal" sight. |
Yes, it has a fancy name doesn't it, but wasn't it originally designed to be used at Night and then someone noticed it was also usefull even during daylight? |
Normal night vision equipment amplifies light from the visible spectrum. Thermal viewers amplify thermal IR radiation. The difference is that in the first case, light levels determine how bright an object will be in the viewer. So, with normal night vision, on a dark moonless night, you still won't see very much. Use normal night vision on smething bright, and it becomes useless (and older models without overload protection would be damaged). Thermal shows the temperature. So even in the darkest night, a tank with a running engine will still be clearly visible.