This first-class 3.5X-90X binocular stereo zoom microscope incorporates all the most excellent features of a high quality laboratory instrument. Designed to meet the demands of modern microscopy applications this scope exceeds all expectations. It comes with SUPER widefield optics and versatile illumination system that provides both incident (top) lighting and transmitted (bottom) illumination. You can choose between incident illumination shining down onto the object or transmitted illumination through the frosted stage plate. The first is used for the observation of three-dimensional objects and the second for the inspection of the objects that allow light to get through them like diamonds. This microscope offers high resolution and good depth within a broad field of view. It provides crystal clear sharp stereo images 2-1/2 (65mm) super wide field of view 26:1 large zoom magnification range and 8 (200mm) working distance. Its 45 degree inclined binocular head ensures an easy observation and rubber eye-guards provide further comfort. It is useful for many applications. It can be used in gemology geology forestry archaeology agriculture and biology. It is appropriate for educational purposes in hospitals and schools. It is great for the exploration of the world of surface details and fine structures of various materials like wood metal solder semiconductor and gemstone. It is perfect for the examination of insects plants rocks stamps coins jewel soldered points microelectronic components circuit boards or virtually any three dimensional objects. This scope is an ideal tool for research labs gemologists collectors engravers watchmakers jewelers dies-makers philatelists and anyone in semiconductor or electronics industry. Features : 3.5X-90X Continuous Zoom Magnification Range 30mm Super Widefield 10X Eyepieces 8 (200mm) Large Working Distance 45 Degree Inclined Binocular Head Crystal Clear Original True Color Images Erect Sharp Stereo Images over a Super Widefield of View High Resolution with Great Flatness and Contrast Accurate Alignment Ensuring Fatigue-Free Comfortable Observation Both Ocular Tubes with Adjustable Diopters Adjustable Interpupillary Distance Full Optical Glass Elements Precise Ground Glass Lenses Built-in Epi-illumination and transmitted lighting system with adjustable intensity Metal Pillar Stand Finished with Stain Resistant Enamel All Metal Mechanical Components CE approval electric apparatus Rubber Eye-guards Included Manufactured under ISO 9001 Quality Control Standard Excellent Five (5) Year Manufacturer Warranty Specifications : Head: 45 degrees inclined 360 degree swiveling binocular Eyepieces: 30mm super widefield high-eyepoint WF10X/20 Objective: 0.7-4.5X Barlow Lens: 0.5X and 2.0X Zoom Range: 26:1 Maximum Field of View: 2-1/2 (65mm) Minimum Field of View: 3/16 (4.75mm) Working Distance: 8 (200mm) Diopter Adjustment: +/-5dp Interpupillary Distance: 2-3/16 - 2-15/16 (55-75mm) Frosted Glass Plate: 3-3/4 (95mm) in diameter White/Black Plastic Plate: 3-3/4 (95mm) in diameter Incident (Top) Illumination: 12V/15W halogen bulb Transmitted (Bottom) Illumination: 12V/15W halogen bulb Power Supply: 110V/60Hz (220V/50Hz version available) Accessories: dust cover eye-guards and clips