This is a trinocular 7X-45X zoom stereo microscope that gives crystal clear sharp images. It comes with a trinocular head with 30mm super widefield high-eyepoint 10X eyepieces and a double-arm heavy-duty boom stand. The 45 degree inclined trinocular and high-eyepoint design ensures an easy observation especially for eyeglass wearers. The rubber eyeguards provide further comfort. The trinocular port enables to add photographic or video capability. The double-arm boom stand allows you to turn the microscope head around three different axes (x y and z) allowing you to point the microscope head toward to ANY direction. This microscope offers high resolution super widefield of view 6.5:1 magnifying zoom range and 4 (100mm) working distance. It is an ideal instrument for research labs gemologists engravers collectors and anyone in semiconductor and/or electronic industry. This stereo zoom microscope is made by the same technicians and on the same production line as optical instruments for Leica Zeiss Nikon and Olympus. Features : 7X-45X Continuous Zoom Magnification Range Trinocular Design for High Quality Photo Video or PC Attachment Upright Tube for USB Digital Camera Video Camcorder or CCD Camera 30mm Super Widefield 10X Eyepieces 4 (100mm) Large Working Distance 45 Degree Inclined Trinocular 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 Versatile Boom Stand Covering Large Working Area Double-Arm Design for 3-Degree Freedom Allowing Placing Microscope Head Toward to Any Direction Rugged Solid Cast Steel Base 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 degree 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 (33mm) Minimum Field of View: 3/16 (4.75mm) Diopter Adjustment: +/-5dp Interpupillary Distance: 2-3/16 - 2-15/16 (55-75mm) Working Distance: 4 (100mm) Boom Stand: 20 double-arm (overall length: 30 ) 17 high pillar 10-1/4 x8-1/4 x2-0 solid cast steel base Accessories: eye-guards Packing List: One Trinocular Stereo Zoom Head One Pair of Super Widefield 10X Eyepieces One Double-Arm Boom Stand One Focus Rack One Pair of Eye-Guards User s Manual Shipping Weight: 75 lbs Packages: 2 (60 lbs 15 lbs)