This microscope features a unique simul-focal optical system with an adjustable trinocular port to enable well-focused clear images on your computer/video screen while simultaneously obtaining sharp focused images through the eyepieces. Most trinocular microscopes allow you to view either through the trinocular port or the eyepieces only forcing you to switch between the two. Since these trinocular ports are not simul-focal with the rest of the microscope optical system you have to re-focus the microscope after each switch. This microscope however erases this step by providing simul-focal viewing. Especially convenient for quality-control inspections teaching demonstrations and many other industry applications your colleagues or students can simultaneously view clear images shown through the trinocular port while you work through the eyepieces. This microscope comes with a simul-focal trinocular head a pair of super widefield high-eyepoint 10X eyepieces and a double-arm heavy-duty boom stand. This microscope offers high resolution crystal clear images large magnifying zoom range and long working distance. The 45-degree inclined trinocular head and high-eyepoint design ensures comfortable observation including eyeglass wearers. In addition the rubber eye-guards provide further comfort. The trinocular port also allows the ability to add photographic or video capability. The double-arm boom stand lets the user manipulate the microscope head around three different axes (x y and z) and to maneuver the microscope head in any direction desired. It is an ideal instrument for anyone in the semiconductor and electronics industries research labs gemology engraving and serious collecting. Made by the same OEM supplier that provides optical instruments for Leica Zeiss Nikon and Olympus and retails for more than $2 000. Features : Simul-Focal Optical System Allows Simultaneous Observation Through Both the Eyepieces and the Trinocular Port + Have well-focused clear images on your computer/video screen and through the eyepieces at the same time. + No need to switch between the trinocular port and the eyepieces + No need to re-focus the microscope after each switch 30mm Super Widefield 10X Eyepieces + Sharp stereo images over a super widefield view + High resolution with great flatness and contrast + Crystal clear original true-color images Versatile heavy-Duty Double-Arm Boom Stand + Covers large working area + 3-Degree freedom design allowing the microscope head to be pointed in any direction desired + Rugged solid cast steel base finished with stain resistant enamel 3.5X-90X Continuous Zoom Magnification Range 45-Degree Inclined Microscope Head 8 (200mm) Large Working Distance Upright Trinocular Tube for Attaching Digital Cameras Video Camcorders or CCD Videos Accurate Alignment Ensuring Fatigue-Free Comfortable Observation Both Ocular Tubes with Adjustable Diopters Adjustable Interpupillary Distance Full Optical Glass Elements Precise Ground Glass Lenses All Metal Mechanical Components Rubber Eye-guards Included Manufactured under ISO 9001 Quality Control Standard Excellent Five (5) Year Manufacturer Warranty