2X-180X Extreme Widefield Binocular Stereo Microscope on 3D Boom Stand 2X-180X continuous zoom magnification with super great flatness and contrast Extreme widefield fully-coated optical system offering top quality sharp images 5-3/4" (145mm) extremely large field of view and 14" (350mm) extremely large working distance 3D boom stand allows you to point microscope head in any directions desired