B006QN5T5G AmScope SM-3BZ-80S Binocular Stereo Microscope, WF10x Eyepieces, 3.5X-90X Magnification, 0.7X-4.5X Objective Power, 0.5X and 2.0X Barlow Lenses, 80-Bulb Ring-Style LED Light Source, Single-Arm Boom Stand, 110V

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3.5X-90X continuous zoom power with great flatness & contrast
Super widefield optics offer crystal clear stereo images
2-1/2″ super widefield view and 8″ large working distance
Sturdy single-arm boom stand covers large working area
Powerful 80-LED compact ring light with built-in dimmer