Viewing head: Mechanical tube length 160mm,45' inclined,360' rotatable Monocular head. Eyepiece: Wide field eyepiece-WF10X18mm,WF15X13mm Objective: DIN 195mm achromatic objective 4X/0.10,10X/0.25,40XS/0.65,100XS/1.25. Nosepiece: Quadruple nosepiece. Condense: rack and gear type Abbe.N.A.1.25 condenser with iris diaphragm and filter. Stage: 140mm * 140mm movable double layers stage, move range 50mm * 76mm, focus precision 0.1mm. Illumination: Built-in illumination system as 230V/20W (6V/20W halogen bulb) (CE and GS approved) or 115V/20W (6V/20W halogen bulb). the brightness can adjust. Focusing: Coaxial focus system with tension adjustment, with up-limited fining focus precision 0.002mm