Nikon AC 2S. Nikon's world-renowned optics, which give you brighter, clearer images and an improved minimum focusing distance for working in confined spaces. You'll see the difference when you look through a Nikon automatic level. Nikon's legendary optics effectively let in more light, resulting in brighter, sharper images so you'll see much more detail and less distortion, especially in low-visibility conditions. Better optics help you aim more precisely, and they're much easier on your eyes-something you'll appreciate on long workdays.