The Pentax C70403PS is a 4mm pinhole lens for use with 1/3" CCTV cameras in security and machine vision imaging applications. It incorporates advanced optical elements to ensure excellent image sharpness and superb light conductivity. It is also equipped with an auto iris function so that it can be used in areas with changing amounts of light. Its durable design also means that users will get long-term dependable performance in a variety of industrial operating environments.