Eyepiece Wide Field (WF) 10×, 20 mm'; includes a reticule 10×-20 mm (Crosshair reticule 0.1 mm) Objectives Infinity Plan objectives: 4×, 10×, 20×(s), 40×(s) Viewing Head Binocular or Trinocular head; rotatable 360°; interpupillary distance (IPD) ~ 50-75 mm Nosepiece Quadruple (4-position) nosepiece Mechanical Stage Rotatable 360°; centre adjustable; graduated; with "Venire" reading 6′ (minutes) Condenser Abbe condenser, numerical aperture (N.A.) 1.25, with iris diaphragm Focus (Focusing Control) Coaxial coarse and fine focus knobs on both sides, large knobs; includes tension / torque adjustment; coarse/fine strokes given (coarse stroke ~22 mm, fine stroke ~100 µm) Polarizing System Polarizer / analyzer; includes Bertrand lens; λ (lambda) slip-red, quarter-wave plate (1/4 λ), Quartz wedge Illumination LED, 3.3 W / 3 V; transmission illumination; ISO-CE compliant Power / Voltage Universal power supply, 110-240 V, 50/60 Hz Magnification Range With the eyepiece and listed objectives, magnification up to ~40× (or more depending on "(s)" objectives)