Vari-focal IR corrected lens for day/night megapixel cameras.
The P-Iris lens in contrast to DC-Iris lens reacts not only for the level of light, but also takes into account the impact of opening the aperture for example on the depth of focus. To control the lens of this type is necessary to implement the appropriate firmware in camera.
The lens uses a combination of lenses to compensate the chromatic aberration for infrared wavelengths.