The Sokkia B20 Automatic Level is a highly accurate surveying and construction tool for taking a horizontal plane, height, as well as distance measurements. This optical instrument features a 24X magnification. To reduce eyestrain, it has an approximate 1/16 in. accuracy, 0.5 arc-second accuracy and a built-in compensator that provides exceptionally bright and sharp views. The B40A-25 comes with an ultra-short focus distance of 7.9 in. from the end of the telescope, making it easy to use in confined locations. This survey instrument has a 1.26 in. objective aperture, a quick collimation and a pendulum compensator with a magnetic dampening system. The 360° horizontal angle measurement can be taken directly below the eyepiece. With an IPX6 rating, water projected in powerful jets from any direction have no harmful effects. It includes a 5/8-11 tripod thread that is compatible with most tripods. As an extra feature, there is an optional diagonal eyepiece that can facilitate work in extremely tight spots with little space behind the instrument.