Nikon HGA23211, AE-7C, 30X, Automatic Level With Circle, 360 Degree

AE-7/AE7C waterproof telescopes reduce minimum focusing distance down to 0.3m (0.98ft)These waterproof telescopes with reduced minimum focusing distance of 0.3m (0.98ft) feature endless horizontal drive for smooth precise pointing and angular measurement, and they can be attached to either flat- or spherical- head tripods. In addition, a pentaprism mirror enables the viewing of a circular bubble as an erect image. They come with optional, high- and low-power eyepiece lenses, and attachable diagonal eyepiece lens for use in confined spaces. Another useful feature is clampless horizontal alignment. Other features: ? Accuracy of A±1.0mm in 1km double-run leveling, or A±0.45mm when an optical micrometer is used ? Automatic compensator with wide working range of A±16' ? 30xz, A¸40mm-dia. telescope. Note: AE-7 is identical to AE-7 except the AE-7 includes horizontal circle reading. Accessories:AS/AE Series auto levels include a carrying case, adjusting pins and a lens cap. You can also choose a plane parallel micrometer for high-precision leveling, a cross-hair illuminator for working in tunnels, or a diagonal eyepiece prism for steep sighting. Automatic compensator ensures reliabilityAll AS/AE Series auto levels are rugged and shock-resistant-and they feature a unique automatic compensator that prevents magnetic interference. AS models offer a compensation range of A±12', while AE models offer a range of A±16'. All offer highly accurate 1-km double-run leveling (A±0.8 mm for AS models, A±1.0 mm for AE models). Powerful telescopes with improved minimum focusingAS-2/AS-2C auto levels feature a 34x high-magnification telescope with optional 22x low-power and 43x high-power lenses; AE-7/AS-7C models feature a 30x telescope with optional 19x low-power and 37x high-power eyepiece lenses. For tight spots, AS-2/AS-2C models offer minimum focusing down to 3.28 ft (1 m); AE-7/AE-7C models offer minimum focusing down to 0.98 ft (0.3 m).