CCTV cameras require an optical lens. The job of the lens is to limit and focus light onto the image sensor of the cctv camera. A lens can also automatically control the amount of light that reaches the imaging sensor, these lenses are referred to as Auto Iris (AI) lenses and are generally used outdoors where the light changes constantly during the day, at night and also in varying weather conditions.

CCTV cameras require an optical lens. The job of the lens is to limit and focus light onto the image sensor of the cctv camera. A lens can also automatically control the amount of light that reaches the imaging sensor, these lenses are referred to as Auto Iris (AI) lenses and are generally used outdoors where the light changes constantly during the day, at night and also in varying weather conditions.