The Marshall V-ZPL06 is a manual vari-focal industrial pinhole lens designed for 1/3" CCD cameras. This lens has a 4-20 mm range of focal length with a wide range of view angles. Its aperture wide open is f/2.5, reasonably effective in lower lighting conditions. It can also be used with 1/2" CCD cameras which will give an amazing 120° angle of view at full 4 mm wide.