AIDA Imaging HD Varifocal 2.8-12mm Manual Iris CS Mount Lens2. 8mm 12mm Varifocal Mega Pixel Lens The CS Mount 2. 8 12mm Varifocal 3 Megapixel Lens from AIDA Imaging is optimized for use with Full HD AIDA cameras that have 1 3" CMOS sensors, and is compatible with 3rd party CS mount cameras with a 1 2. 7" or 1 3" sensor. The compact lens features a 2. 8 to 12mm focal length with manual focus and offers a 6 to 60 field of view. The iris is also manually adjustable to a maximum aperture of f 1. 4.