This revised model (previously S1100) features a rear facing nosepiece with positive click to ensure parcentration with all objectives. The binocular head is rotatable 360° and inclined at 45°, with a 55-75mm interpupilary distance range. A pair of W.F 10x eyepieces (18.5mm field of view) is included. DIN Achromatic or Semi Plan graded objectives 4x, 10x, 40x and 100x objectives (40x, and 100x are retractable) are available. A mechanical stage is supplied with a moving range of 75 x 50mm on the stage 140mm x 140mm. The Abbe condenser has a NA of 1.25 with iris diaphragm, filter holder and blue filter, control of this mechanism is by rack & pinion adjustment. Focusing is achieved with a precise low positioned coaxial mechanism. The power supply is 110 volt, CE approved, with a 6v 20w variable halogen illumination system that has a detachable cord. Includes small bottle of oil immersion. This microscope is ideal for educational or medical student use and comes with a five year warranty and FREE ONE YEAR EXTENDED WARRANTY.