The AP-120 Series of levels benefit from a sleek, ergonomic design and have a brightly coloured top plate to ensure high visibility on site. Smooth focusing, a choice of magnifications, bright optics and a robust construction make these new Pentax levels the ideal instrument for both builders and engineers.Major Features of the Pentax AP -120 Series of Auto Levels : Competitively priced in line with market requirements Robust in design and built to withstand every day use on todays construction sites Choice of magnifications - 20x, 24x and 28x Minimum focussing distance of just 0.4m Waterproofed to JIS Class 4 Magnetically damped automatic compensator Each level is supplied with a robust carrying case and a user manual.Specifications AP-128 AP-124 AP-120 Telescope Image Erect Magnigication 28 X 24 X 20 X Effective aperture (mm) 30 mm Field of view (at 100m/ft) 2.3 m / 2.3 ft. Minimum focus (m/in) .4 m / 16 in. Resolving power 3.0″ 3.5″ 4.0″ Stadia ratio 1:100 Stadia constant 0 HORIZONTAL CIRCLE Minimum Division 1° Estimation 0.25° Type Outside Ring Diameter 108 mm COMPENSATOR Type Metallic Strand Damping Magnetic Range ±15′ Setting Accuracy ±0.5″ ACCURACY Standard Deviation ±1.5mm ±2.0mm ±2.5mm Single Reading Fraction of inch at 100 ft. 2.23 / 64 2.42 / 64 2.61 / 64 SENSITIVITY OF VIAL Circular Vial 10′ / 2mm LEVELING BASE Type 3 screw Tripod Flat or Dome WEIGHT Instrument 1.9 kgs / 4.2 lbs. Carrying Case 1.4 kgs / 3.0 lbs.