Varifocal lenses permit users to change the effective focal length (EFL) and the horizontal angle of view. This flexibility allows camera installations in a variety of places that often require lenses of different focal lengths.Features1/3", 1/2.7", 1/2.5", 1/4" 2MP CMOS SensorsCS Lens Mount with 4Pin DC Auto-Iris PlugManual Focus Varifocal LensMaximum Relative Aperture: F1.2 ~ 8Angle of View determined by model #