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The Sokkisha Lietz B2-A Automatic Level is a classic optical level commonly used in surveying and construction before digital levels became standard. Here’s a quick overview:

-General Description

• The B2-A is a dumpy/automatic level designed for leveling tasks such as:

• Establishing elevation benchmarks

• Transferring heights

• Construction site leveling

• Roadwork and drainage projects

• It was manufactured by Sokkisha Co. Ltd. (Japan), which later became part of Topcon. In North America, it was distributed by Lietz.

- Key Features

• Magnification: typically 30X

• Objective Aperture: about 40 mm

• Field of View: approx. 1° 20′

• Compensator: Magnetic damping automatic compensator for quick, stable line of sight

• Focusing Range: as close as ~1.5 m (5 ft)

• Stadia Ratio: 1:100 for distance measurement with leveling rod

• Accuracy: around ±2.0 mm per km of double-run leveling

• Horizontal Circle: Graduated 360° scale for simple angle readings (not a theodolite)

• Weight: about 2 kg (4.5 lb)

• Mounting Thread: Standard 5/8-11 tripod screw

- Typical Package

• B2-A instrument

• Hard carrying case

• Sunshade or lens cap