TheLandOfConfusion t1_j4j953g wrote

It’s the tradeoff between wide field of view, image quality, and price.

You want the camera to cover a wide area (otherwise you need a lot more cameras, which is expensive). That means they’re usually low focal length or fisheye (so you can’t get a clear image of small details like facial features)

The solution to that problem would be cameras that can swivel and zoom, which is too expensive.

Three options, and you can pick two. Usually they pick wide coverage and not expensive.