Check the listing for details. Nikon AE-7 AUTO LEVEL. Condition: Used. Listed at 400.25 USD. TELESCOPE Tube length . . . . . . . . . .. . . . . . . . . : 8.7 in (220 mm) Magnification . . . . . . . . . . . . . . . . . . . . . . . . . . . . : 30x Resolution power . . . . . . . . . . . . . . . . . . . . . . . . . : 3" Field of view . . . . . . . . . . . . . . . . . . . . . . . . . . . . : 1°30' (2.6 ft @ 100 ft) Minimum focusing distance . . . . . . . . . . . . . . . . : 0.98 ft (0.3 m) Stadia ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1:100 Stadia additive constant . . . . . . . . . . . . . . . . . . . 0 LEVEL VIAL SENSITIVITY Circular level . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10'/2 mm STANDARD DEVIATION in 1-km double-run leveling Without micrometer . . . . . . . . . . . . . . . . . . . . . . . : ±1.0 mm With micrometer . . . . . . . . . . . . . . . . . . . . . . . . . : ±0.45 mm AUTOMATIC COMPENSATOR Type . . . . . . . . . wire-hung, air damper Compensation range . . . . . . . . . . . . . . . . . . . . .. : ±16' Setting accuracy . . . . . . . . . . . . . . . . . . . . . . . : ±0.35" Diameter of circle . . . . . . . . . . . . . . . . . . . . . . . . . : 4.6 in (118 mm) Minimum increment . . . . . . . . . . 1°/1 g Scale reading (direct) . . . . . . . . . . . . . . . .: 1°/1 g Reading by estimation . . . . . . . . . . . . . . . : 0.1°/0.1 g DIMENSIONS Instrument (L x W x H) 8.7 x 5.4 x 5.6 in (220 x 136 x 142 mm) Carrying case (L x W x H) . . : 14.9 x 7.7 x 7.8 in (379 x 195 x 197 mm)WEIGHT Instrument : 3.7 lb (1.7 kg) Carrying case . . . . . . . . . . . . . . . . . . : 4.2 lb (1.9 kg If you have any question please feel free to ask us !