AIDA Imaging 4K Varifocal 3.6~11mm Auto-DC Iris CS Mount Lens The CS-Mount 3.6mm-11mm Vari-focal 8MP 4K Lens from AIDA is optimized with the AIDA Imaging 4K cameras with 1/2.5” Progressive CMOS sensors. MAIN FEATURES Optimized and tuned with 4K Cameras CS-Mount Auto DC Iris Varifocal 3.6mm~11mm Horizontal Field of View: 71.4°-23.37°