This binocular biological compound microscope features an infinity-corrected optical system with semi-plan achromatic lenses, and Koehler LED illumination. The extreme wide-field 10X eyepieces provide a large field-of-view (FN 22), with an additional pair of 25X eyepieces for extra magnification. The backward nosepiece design leaves room for easy and convenient operation of the instrument. With four high-quality objective lenses (4x, 10x, 40x, 100x), the B570Dcan achieve magnifications of 40X, 100X, 120X, 300X, 400X, 1000X, 1200X, 3000X. It is an ideal instrument for advanced research organizations, laboratories (especially start-up labs), hospitals/clinics, and collegiate institutes. Features : Semi-Plan Infinity Color-Corrected Optical System with High Resolution Fully Coated Optics with Crystal Clear & Sharp Images Precise Mechanical Stage Control System Reversed Nosepiece Design 30-Degree Inclined, Compensation-Free Binocular Head Eight Unique Magnification Levels: 40X, 100X, 120X, 300X, 400X, 1000X, 1200X, 3000X Variable-intensity Transmitted LED Koehler Lighting System 1.25 NA Abbe Condenser with Iris Diaphragm and Filter Holder Rack and Pinion Condenser Adjustment Low Position Coaxial Stage Movement Control Knobs Dual Coaxial Focusing Control Adjustable Interpupillary Distance Adjustable Diopter on Eyepieces Durable Cast Alloy Frame with Stain Resistant Enamel Finish Four Semi-Plan Objectives Included One Pair of Extreme Widefield Eyepieces Included Quadruple, Reversed, Extra-Large Nosepiece with Wide, Knurled Grip for Easy Operation Large Double Layer Mechanical Stage with Stain Resistant Coating Upward Stage Limit Stop to Protect Objectives and Slides Manufactured under ISO 9001 Quality Control Standards Excellent Five (5) Year Factory Warranty Specifications : Nosepiece: reversed, ball bearing quadruple Head: binocular head, 30-degree inclined Eyepieces: high eye-point plan eyepieces, WF10X22mm, WF30X Objectives: semi-plan objectives 4X, 10X, 40X (spring), 100X (spring, oil) Focusing: low position coaxial focus system Interpupillary Adjustment Range: 2-1/10" - 3" (54-75mm) Mechanical Stage: 7" x 6-1/4" (180mm x 160mm) Stage Traveling Range: 2-9/10" x 2" (75x50mm) Division of Fine Focusing: 0.00007874" (0.002mm) Condenser: N.A. 1.25 achromatic condenser Illumination: Koehler, 3W LED Power Supply: AC 85V-230V wide voltage, CE certified Packing List : One Binocular Compensation-Free Head One Microscope Body with Frame, Base, and Koehler Illumination System Four High Quality DIN Semi-Plan Objectives: 4X, 10X, 40X, and 100X One Pair of Widefield Eyepieces: WF10X One Pair of Widefield Eyepieces: WF30X One Dust Cover Immersion Oil Users Manual Download