A brief introduction Digital MTZ-200Z optical amplification factor: 50X 100X 400X 600X, system reference amplification factor: 50X-2600X, falling beam illuminator: 6V/20W halogen lamp, 220V (50Hz) brightness adjustable, filter group: turntable, yellow, blue, green, frosted glass, polarizing device: plug-in polarizer and built-in three head polarizer 1. Eyepiece type Magnification factor Focal length (mm) Field of view (mm) Flat field eyepiece 10X twenty-five Φ eighteen 2. Objective lens Objective lens type Magnification factor numerical aperture Working distance (mm) Plan Achromat 5X zero point one two eighteen point three 10X zero point two five eight point nine 40X zero point six zero three point seven 60X zero point eight five zero point two six 3. Optical magnification: 50X 100X 400X 600X 4. System reference magnification: 50X-2600X 5. Fallout illuminator: 6V/20W halogen lamp, 220V (50Hz) brightness adjustable 6. Color filter group: rotary, yellow, blue, green, frosted glass 7. Polarization device: insertable polarizer and built-in polarizer for three-way head 8. Moving range of the loading platform: 50mm longitudinally; Horizontal 75mm 9. Focusing system: Coaxial coarse and micro movement with limit and adjustable tightness device, Micro motion grid value 0.002mm 10. Pupil distance adjustment range: 53-75mm 11. Anti mold: A unique anti mold system 2、 System composition: Computerized Reflective Metallographic Microscope (MTZ-200E): 1. Metallographic Microscope 2. Adaptor 3. Camera (CCD) 4. A/D (Image Acquisition) 5. Computer Digital camera type reflective metallographic microscope (MTZ-200Z): 1, metallographic microscope 2, adapter mirror 3, digital camera.