Celestron Professional Stereo Zoom Microscope 44206 Heavy duty, professional zoom stereo microscope with 10x-67x magnification Extra strong metal base, stand, and head with black/white and frosted/opaque stage plates Fully coated glass optics10x and 15x eyepieces and .7x-4.5x zoom objective lens Top and bottom illuminators, 200 mm (7.9 in) working distance Five prepared slides included