CCTV C Mount Camera

The advantage to a cctv c-mount camera is that the lens can be changed. If you need to see further than 35 or 40 ft then you'll need a c-mount camera with a special lens. An example of where you might use a fixed 4mm lens is in a small office, or at home to focus on your driveway. A higher millimeter lens will provide further distance, but narrows the field of view.