Optical System – Semi Plan Achromatic optical system. Viewing Head - Trinocular 45° Inclined having 55 – 75 mm Interpupillary adjustment separate port for camera and computer. Eyepieces - Wide Field WF10X (18mm) and H15X (paired). NosePiece - Quadruple ball bearing with positive click stops Magnification - 0 to 1000 X oil drop. Focusing - Coaxial coarse/fine focus system with tension adjustable, travel on ball guide. Stage -Low drive co-axial with integrated, low position Mechanical control knob. Filter - Green Polished Day Light Blue Polished. Illumination - Horizontal 12v/50W Halogen lamp with variable light intensity control system dropping filter with aperture daiphragm. Power - 240V AC50/60Hz.