... SZX Series stereo Zoom MicroscopeSZX series zoom stereo microscope, magnification 6.7X-45X ,high quality optical system and new ... and long-working distance. These are ideal for high-magnification, high-resolution observation in biological research, precision-oriented semi ... ratio: 1:6.7Objective zoom: 0.67x~4.5xTotal magnification: 6.7x~45xBoth ocular tubes have diopter adjustment ±5dpInterpupillary ...