Five-step magnifications for main microscope, three-step magnifications for assistant microscope. Lens made of imported glass from Germany can reduce the optical aberration. All of the lens are multi-coated, mildewproof and anti-reflection Equipped with three Objectives and being applicable to ophthalmology, orthopaedics, surgery. Oblique illumination can be used for slitting and slitting width is adjustable. X/Y movement can be automatically centered. Inner Beam Splitter is mounted and can be connected to other outer display.