How far a camera sees depends primarily on the camera’s angle of view (AoV), resolution and what you want to see. There’s simply not a one-size-fits-all camera.
Many low-end cameras work great up to distances of 10 to 20 feet, but fail miserably at distances beyond 30 to 40 feet. By contrast, most high-end cameras are able to accurately capture people at 75 to 100 feet, often in HD or near HD. Video clarity will cost you, but when you’re showing your video or pictures to law enforcement, the clearer the better. (Source: CSO Online)
At Deep Sentinel, we’ve built our camera to have a better than average specification for detection and night vision. It captures the farthest and widest range of vision possible in order to meet the goals of a perimeter detection device.