A13.1102 Metallurgical Microscope Specification Head Compensation Free Trinocular, Inclination of 30 degree,50mm-75mm Eyepiece Wide field WF10X/25mm Wide field WF10X/20mm with crosshair 0.1mm InfinityPlan Apochromatic Objectives Infinity Plan Apochromatic Objectives with Long Working Distance Long Working Distance 35mm PL L5X/0.15. Long Working Distance35mm PL L10X/0.28 Long Working Distance 20mm PL L 20X/0.40 Long Working Distance13mm PL L50X/0.55 Flashboard Filter Blue Filter Green Filter Neutral Filter Focus System Coaxial Coarse and Fine Focusing with Rack and Pinion Mechanism; Fine Focusing Scale Value 0.002mm Nosepiece Quadruple, Center Adjustable Stage Double Layer Mechanical (Size190mmX140mm,Moving Range:50mmX40mm) Light Source 12V/50W,AC 85V-230V Halogen Bulb with Apertrue Iris Diaphragm and Field Iiris Diaphragm, Adjustble Brightness Polarizing Device Analyzer rotatable 360