Pan, Tilt & Zoom CCTV security cameras can move left/right (pan) or up/down (tilt). Most PTZ cameras have optical zoom capabilities, allowing them to zoom in & deliver greater detail from farther away. PTZ cameras can be controlled remotely, using a keyboard or joystick, or via a Security DVR, using a mouse or other pointing device. Some PTZ security cameras can be programmed to sweep/tour several pre-determined locations automatically. Sometimes external triggers, such as motion or door contacts, can cause the camera to reposition itself.