For consumer who have a PRO CCS type camera w/iris capability. High-Quality Lens w/IR-Corrected for light adjustment. Varifocal w/Auto Iris 2.8mm-12mm. Auto Iris & IR-Corrected technology helps adjust lighting changes atmosphere. Adjustable from 2.8mm for wide angle view to 12mm for more distance viewable. This lens has 1/3” Format DC Auto-Iris, CS Mount Type, 2.8mm~12mm Focal Length, Glass Lens, F1.4 bright lens, 29°~96° angle of view

IR-CORRECTED LENS Use a day & night or monochrome cameras for the IR corrected lenses. Regular color cameras will not be affected by the IR corrected lens. When using the day/night or monochrome cameras, nearly any outdoor, as well as some indoor applications, will require, or at least benefit from using IR corrected lenses. This is because many natural light sources also contain infrared light, lighting changes with a higher infrared, lower infrared, or without infrared at all. When using ordinary lenses, the result is a blurred, or in a worst case scenario, a completely unfocused picture.