High image-quality monitoring with optical performance supporting 3 megapixels. Advanced design engineering and special optic glass adopted, best suited for color, black and white, and day and night cameras. SLA-F-M226DN is equipped with a wide 2.2mm, achieving a horizontal field angle of 144 degrees (when used on 1/2.7” sensor cameras) This lens is designed to maximize optical performance with high-accuracy aspheric lens, low-dispersion glass, and high refractive-index glass. Built-in ND filter of T360, supporting high sensitivity cameras.