Characteristics Zoom magnification for main microscope, three-step magnifications for assistant microscope; Fine focusing for assistant microscope keeps the same clearness as main microscope. Lens made of imported glass from Germany can reduce the optical aberration. All of the lens are multi-coated, mildewproof and anti-reflection X/Y movement and focusing can be automatically centered. Special motorized inclinations are suitable for special observation angle. Special protection device for objective can keep the objective clean. Independent electrical box has automatical diagnosis function , which is very convenient for repair if necessary