Day & Night cameras from Axis are designed to switch to a low-light mode by removing the IR-cut filter, making them sensitive to infrared light. In this mode, the cameras are most sensitive to IR light at a wavelength of 850 nm, which is commonly used in IR illuminators for night vision. This wavelength provides a good balance between visibility and discreetness, allowing the camera to capture clear images in low-light conditions. Axis Network Video documentation details the sensitivity range and performance characteristics of Day & Night cameras, emphasizing the importance of 850 nm wavelength for optimal night-time performance.
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