Camera lenses

Lens

— interchangeable "eyes" for CCTV cameras. There are monofocal (with a fixed focal length), varifocal (with a manually adjustable field of view angle) and zoom (with a motorized zoom drive). Interchangeable lenses for cameras are also classified by viewing angle: wide-angle lenses are often used indoors, models with a narrow viewing angle are used in open spaces, and optics with a field of view angle of less than 30 ° are used for shooting objects at a distance. Another important parameter when choosing a suitable lens is the aperture value, the degree of openness of which determines the amount of light entering the camera matrix. The most advanced are models with an automatic iris that adapts to ambient lighting conditions.