Provide superior image and reliable mechanical structure: Easy operating, various of accessories, widely used in teaching and research metallographic analysis and facility materials testing ■ Optical system：Infinity color corrected optical system（CSIS）,better image, higher resolution, more comfortable observation; ■ Eyepiece and Objective：high eyepoint widely plan eyepiece PL10x/22mm provide more widely and plan observation space and can be installed  various of micrometer. Professional infinity plan achromatic LWD metallurgical objective, no cover glass design. ■ Viewing head: trinocular head diopter adjustable 45°inclined,can photo graph and image pickup, can collect and preserve the image, also can analysis the image with computer and specialized software. ■ Focus：Low hand position coaxial coarse and fine focusing mechanism, with coarse tension adjustment device, Coarse adjustment range 38mm,precision of fine adjustment 0.002mm。 ■ Illuminator system：Reflection Koehler illuminator with iris diaphragm and centerable filed diaphragm, wide  voltage 90-240V ,12V/50W imported  halogen bulb, effectively protect and extend the life of halogen bulb. ■ Stage：can be setting coaxial low hand position removable stage and the stage extension plate, expand the application space, to meet the different needs of customers