OMAX 3.5X-90X Trinocular Zoom Stereo Microscope with 60 LED Ring Light

This zoom stereo trinocualr microscope system includes a 3.5X-90X zoom stereo trinocular microscope with dual lights - reflected and transmitted plus 60-LED adjustable intensity shadowless ring light. With the 0.5X barlow lens, the working distance can be as long as 6-1/2" (165mm), and the field of view can be as large as 2-3/8" (60mm) in diameters. The optional 2X auxiliary lens can be used to increase the total power to 180X which is good for some precision instructments. An optional USB 2.0 digital ca