This binocular 3.5X-90X zoom stereo microscope on single-arm boom stand provides crystal clear sharp clear images. It comes with a binocular head with super widefield optics and sturdy single-arm boom stand. The 45 degree inclined binocular oculars and high-eyepoint optical design ensures a comfortable observation for all users including eyeglass wearers. The single-arm boom stand allows you to turn microscope head around two different axes and point it in various directions. This microscope offers high resolution, super widefield of view, 26:1 magnifying zoom range and 8" (200mm) working distance. It is an ideal instrument for researchers, gemologists, engravers, collectors and anyone in semiconductor and electronics 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. It is brand new in factory box. Its retail value is $1800.