AmScope Trinocular Metallurgical Compound Microscope Plan Optical System Offering Six Magnification Powers: 50x to 500x High Quality PLAN Achromatic Objectives and Plan Eyepieces with Shape Images Polarizing Filter and Analyzer Included; Tension Adjustable Coaxial Coarse & Fine Focus EPI Halogen Illumination with Variable Intensity Control Three Metallurgical Magnification Powers (50x, 100x and 500x) and Three Polarizing Settings (50x, 100x and 500x)