3.5X-90X Extremely Large Zoom Magnification Power Simul-Focal Optical System Allows Simultaneous Observation Through Both the Eyepieces and the Trinocular Port Have well-focused, clear images on your PC or video Screen AND through the microscope eyepieces at the same time. No need to switch between the trinocular port and the eyepiece No need to re-focus the microscope after each "switch" Trinocular Design for High Quality Photo, USB PC and CCD Video Imaging Upright Tube for USB Digital Camera, Video Camcorder or CCD Camera High Resolution with Great Flatness and Contrast Erect Stereo Sharp Images Over a SUPER Widefield of View Accurate Alignment Ensuring Fatigue-Free Long Time Viewing Crystal Clear Original True Color Images 45° Inclined Trinocular Head with SUPER Widefield High-Eyepoint Eyepieces 30mm SUPER Widefield Eyepieces (see the difference in the above picture) Both Ocular-Tubes with Adjustable Diopter Adjustable Interpupillary Distance Full Optical Glass Elements Precise Ground Glass Lenses 8" (200mm) Extremely Large Working Distance Versatile Boom Stand Covering Large Working Area Double-Arm Design for 3-Degree Freedom Able to Place Microscope Head Toward to Any Direction Heavy-Duty Cast Steel Stand Finished with Stain Resistant Enamel Rugged Solid Cast Steel Base 30mm SUPER Widefield Eyepieces Included 0.5X and 2.0X Barlow Lens Included Rubber Eye-Guards Included