The Olympus SZ series Stereo Zoom Microscopes are of excellent quality and performance. They provide superb resolution, high magnification and compact design. Ideal for a wide variety of applications including medical, pharmaceutical, biological research, material sciences, mineralogy, metallurgy, semi-conductor and quality control. Extra long working distance optics make this series ideal for integration into bonders and probers. SZ4045 The work horse of the Olympus line. Fine optics, 6:1 ratio, .67x to 4x zoom range, up to 120x maximum magnification and 110 mm working distance.