This high quality microscope is designed for professional jewelers and gemologists. It includes a 3.5X-90X super widefield zoom stereo microscope head, 3D jewelry/gem clamp (tweezers), rotatable round stage with darkfield iris condenser and professional GEM stand. It offers 8" (200mm) working distance, 2-1/2" (65mm) super wide field of view and 26:1 large zoom magnification range. The microscope is illuminated with a 30W darkfield halogen light built in to the base and a 7W gooseneck rectangular fluorescent incident light box, providing rich spectrum, high-temperature color and close-to-daylight illumination. The incident light box shines light down onto objects, used to observe the surface details and fine structures of jewels or gemstones. The transmitted light through the darkfield condenser is designed for the examination of the inside quality of diamonds. This microscope is manufactured under the strict guidelines established under ISO 9001:2000 Standards. Features: A high quality professional 3.5X-90X trinocular jewelry/gem microscope with rotatable darkfield stageA right microscope for distinguishing genuine & imitation gems and judging production originComfortable Ergonomic designHigh resolution sharp images with both bright and dark field illuminationLarge rotatable round stage with built-in darkfield condenser, 3D gem clamp and graduationsAdjustable stand for easy and comfortable observationPossible to measure gem anglesAdvanced halogen system providing rich spectrum, high-temperature color, and close-to-daylight illuminationFlexible gooseneck-supported rectangular incident (top) fluorescent lampBright halogen bottom light with dimmer for best darkfield illuminationBuilt-in darkfield condenser with iris3D flexible gem clamp45 degree inclined 360 degree rotatable trinocular headTrinocular port for adding photo or video capabilityLarge zoom magnification rangeHigh resolution optics with great flatness and contrastSharp stereo erect images over a wide field viewCrystal clear original true color imagesEye tube with adjustable diopterAccurate alignment ensuring a fatigue-free viewingFull optical glass elementsPrecise ground glass lensesAll metal mechanical componentsAdjustable interpupillary distanceRubber eye-guards includedManufactured under restrict ISO 9001 quality control systemFive year manufacturer warrantySpecifications: Head: 45 degree inclined 360 degree swiveling trinocularEyepiece: 30mm widefield WF10X/20Barlow Lens: 0.5X and 2.0XObjective: 0.7-4.5XZoom Range: 26:1Field of View: 2-1/2" (65mm)Working Distance: 8" (200mm)Interpupillary Distance: 2-3/16" - 2-15/16" (55mm-75mm)Stand: gemology stand, inclinable up to 38 degreesIris Diaphragm: 2 - 41mmFocal Range: 4-3/8" (110mm)Stereo Angle: 12.4 degreeDiopter Adjustment: +/-5dpTop Illumination: 7W fluorescentBottom Illumination: 6V/30W halogenPower Supply: 100-240VAC 50/60HzAccessories: dust cover, eye-guards and clips.