Camera Lens
Security Camera Lenses of all types from the micro lens to the Motorized Zoom lens. Many traditional surveillance cameras do not come with a lens. As such, it is important to understand the different lens types and their related terminology. The three main types of lenses are based on focal length and are normal, wide-angle, and telephoto. Focal length is defined as the distance from the center of the lens to the surface of the CCD sensor of the CCTV camera. It is the point at which light rays focus when the lens is fixed on an object at infinity.
