Lenses can play a significant role in the distance at which a camera imager can detect infrared illumination.

If the camera in use has an interchangeable lens, be sure to select one with the lowest F-Stop possible. Like lux ratings for cameras, the lower F-Stop of a lens, the better it will be for low light operation. A great lens to start with is one with an F-Stop of F1.2 or low

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