Nikon SMZ 745 Stereo Zoom Microscope Optical Body MMA364000 was developed to meet the needs of researchers who demand more advanced features and higher performance from a stereo microscope. For these reasons, Nikon believes the Nikon SMZ 745 Dual Channel Microscope will become the new standard for >stereoscopic zoom microscopes in the 21st century. The wide-field eyepieces with diopter adjustment bring the image and the reticle into focus at the same time, making it easier to view the specimen, while reducing eye strain. By using twin zooming objective optics developed exclusively by Nikon, this research microscope incorporates a convenient 6.3X:1 zoom ratio, enabling observations at just the right magnification to match the sample. The zooming knob features click stops which allow changes in magnification in 1X intervals from 1X to 4X without removing your eyes from the eyepieces. And since it is easy to maintain the same magnification, efficiency is ensured, whether you are using the Nikon microscope by yourself or sharing it in a laboratory situation. Even though the Nikon SMZ-745 Stereoscopic Dual Channel Microscope offers extremely high magnifications, it still provides the longest working distances of any stereo microscopes in its class. This allows you to process and manipulate samples with ease, even while performing delicate or complex tasks.