Features Ideal for Geology, Petrology, Mineralogy, Pharmaceuticals Etc Conscopic & Orthoscopic Observations Incident Light Illumination w Polarizer Trinocular Dedicated Camera Port w C-Mount Anti Fungus, Anti Reflection & Hard Coating on all Optical Components Magnification Levels 40x, 60x, 100x, 150x, 400x& 600x Eyepiece for Centering & Linear Scale Sliding Bertrand Lens w Centering Rotating Analyzer Swing Out Polarizer Circular Rotating Stage w Centering Screws Separate Coarse & Fine Focusing Knobs on Rack & Pinion Gypsum & Mica Plates (Full and 1/4th Order) Best Price to performance Ratio Switchable between Brightfield Metallurgical & Polarizing