Microscope (MF-B4020B) MF-B4020B (Mitsutoyo) Specifications Measuring range : 400 x 200 mm Eyepiece : Binocular 10x Objective lens : 3x, 5x, 10x, 20x Image unit : 8BS system Measurement accuracy : (2.5 + 0.02L) μm [L: Measurement length (mm)]