The Tokina 1/2" C Mount 15-500mm f/2.3 Auto Iris Motorized Zoom Lens w/Preset is a motorized zoom lens for use with 1/2", C mount industrial CCTV cameras. It offers a focal range from 15 to 500mm, which translates into a 33x magnification factor. Built into the lens is an auto iris video function which will automatically adjust the iris opening on the lens in response to changing light levels. Unlike a DC iris lens, this video iris lens does not need to rely on the camera to make these adjustments and can therefore achieve more accurate results.
This lens has all the features of the standard 33x zoom lens (TM33Z1523AI) plus the added benefit of an auto iris preset function. This will allow often used iris settings to be instantly accessed by a one-touch command sent from a CCTV lens controller.