TOPCON AT-B3A Auto Level (28X)

Telescope

Length: 214mm (8.42in.)

Magnification: 28X

Objective aperture: 36mm (1.42 in.)

Resolving power: 3.5”

Field of view (at 100m/328ft.): 1°25’ (2.5m / 8.2ft.)

Minimum focus: 0.2m (7.9 in.) from end of telescope

                          0.3m (1ft.) from instrument center

Image: Erect

Stadia constant: 0

Stadia ratio: 100

Focusing knob: 1-speed

Sighting aid: Peep Sight

Accuracy (1km double run leveling)

Without micrometer: 1.5mm (0.06 in.)

With micrometer: n/a

Compensator

Type: Pendulum compensator with magnetic damping system

Setting accuracy:  0.5"

Working range: ±15'

Circular level

Sensitivity: 10'/2mm

Horizontal circle

Diameter: 99mm (3.9in.)

Minimum division: 1°/ 1gon

General

Water resistance: IPX6 (IEC 60529:2001)

Operating temperature: -20~+50ºC (-4~+122°F)

Size

- Width: 122mm (4.8in.)

- Length: 214mm (8.4in.)

- Height: 140mm (5.51in.)

Weight: 1.5kg (3.3lbs.)

Included accessories:

- Auto Level AT-B3A

- Adjusting pins

- Cleaning cloth

- Lens cap

- User manual

- Hard carying case

Optional accessories:

- Myzox Aluminium Tripod

- Myzox Aluminium Stave