Olympus SZ51 and SZ61 Zoom Stereo Microscopes are used in the life sciences to provide superior image quality with ample depth of field for a variety of biological microscopy applications. Olympus SZ51/SZ61 Zoom Stereo Microscopes utilize a 10° angle of convergence Greenough optical system to feature excellent field flatness, along with high clarity, strong detail, and accurate color. Each microscope features convenient front-access controls, a zoom knob stopper for quickly repeatable magnification changes and a comfortable eyepiece design that features pupil aberration control and appropriate positioning at the eye. The Olympus SZ51 Binocular Zoom Stereo Microscope is a cost-effective, versatile solution for applications requiring clear, high contrast images. Olympus SZ51 Binocular Zoom Stereo Microscopes feature a 5:1 zoom ratio along with a magnification range from 8X – 40X when used with a 10X eyepiece. The binocular and trinocular version of the SZ61 stereomicroscope has the 1X objective built in and all other objectives attach to that. The low, suppressed field of curvature ensures accurate reproduction of the original specimen shape. The Olympus SZ61 Binocular Zoom Stereo Microscope features a 6.7:1 zoom ratio along with variable magnification from 6.7 – 45X when used with a 10X eyepiece. The SZ-61R Trinocular Zoom Stereo Microscope is also available that features a trinocular tube with a built in 0.5X C-mount lens for easy compatibility with digital or video cameras.