Ideal for Geology, Petrology, Mineralogy, Pharmaceuticals Etc Conscopic & Orthoscopic Observations Rugged Metal Construction Achromatic Optical System Anti Fungus, Anti Reflection & Hard Coating on all Optical Components Magnification Levels 40x, 60x, 100x, 150x, 400x& 600x Rotating Polarizer Sliding Analyzer Circular Rotating Stage with centering Separate Coarse & Fine Focusing Knobs Bertrand Lens, Gypsum & Mica Plates Best Price to performance Ratio Additional Mirror Attachment for direct light for field work