From the Manufacturer

The Nikon AC-2S automatic levels and delivers a high level of accuracy and ease of use for a variety of civil engineering and construction applications. Compact and lightweight, they are also built rugged and water resistant, giving you reliable performance in light rain or dusty job sites. Nikon’s world-renowned optics provide brighter, clearer images and an improved minimum focusing distance for working in confined spaces. Plus, a built-in magnetic dampened compensator automatically levels the line of sight. See brighter, sharper images with improved minimum focusing. You’ll see the difference when you look through a Nikon automatic level. Nikon’s legendary optics effectively let in more light. The result is brighter, sharper images, especially in low-visibility conditions. You’ll see much more detail and much less distortion. Better optics help you aim more precisely, and they’re much easier on your eyes—something you’ll really appreciate on long workdays. The AC-2S has a 24x telescope. It offers improved minimum focusing distance—now 2.46 Feet (0.75 m) for better performance in tight spots and on steep slopes. Rugged construction with built-in reliability. The AC-2S is compact and light, weighing just 2.8 lbs (1.25 kg) each for convenient field use. Rugged, water-resistant construction lets you work in light rain or dusty conditions. The AC-2S level features a built-in magnetic-dampened automatic compensator to level the line of sight. The compensation range is ±16-Inch, with a setting accuracy of within 5-Inch.