The SM-2T is our best-selling dual-light stereo microscope, due in large part to its simplicity and durability. The time-tested design provides versatility in application, with transmitted and reflected light-sources. The 0.7-4.5X continuous-zoom objective lenses provide an ample magnification range with smooth adjustments for real, hands-on work. The included 10X wide-field eyepieces provide pristine clarity with a large working-area. Originally designed for dissection, the practical uses have broadened greatly to include such things as gemology, PCB-inspection, and electronics-repair. The reflected lighting allows for inspection of opaque objects, including circuit-boards, coins and stamps, minerals, and agricultural materials. The transmitted light provides the pass-through light necessary for translucent objects, such as fluids, tissues, and gems. Features : 7X-45X continuous zoom magnification range Large 4" (100mm) working-distance Sharp, erect stereo images with a wide field-of-view 30mm 10X wide-field eyepieces Precise, high-grade optical glass elements 45° inclined head Trinocular design for stable imaging platform Flexible interpupillary adjustment and dual ocular diopters Built-in reflected and transmited illumination with adjustable intensity Metal pillar stand finished with stain-resistant enamel All Metal Mechanical Components 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 trinocular Eyepieces: 30mm super widefield high-eyepoint WF10X/20 Objective: 0.7-4.5X Zoom Range: 6.5:1 Maximum Field of View: 1-1/4" (31.75mm) Minimum Field of View: 3/16" (4.75mm) Working Distance: 4" (100mm) 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 Packing List : One Trinocular Stereo Zoom Microscope Head One Pair of Super Widefield High-Eyepoint 10X Eyepieces One Pillar Stand with Bottom Light One Focusing Rack One Halogen Top Light One Frosted Round Glass Plate One White/Black Round Plastic Plate One Pair of Stage-clips One Pair of Eye-guards One Power Cord One Dust Cover Halogen Spare Bulb