This is a highly-flexible stereo microscope, designed for workshops and industrial inspection. Featuring a simul-focal head, the photo port can be used concurrent with both eyepieces, allowing you to have an active imaging system without losing use of one of the eyepieces. The objective optics offer a continuous zoom-range from 0.7 to 4.5X, providing 7-45X magnification with the 10X high-eyepoint, super-widefield eyepieces. This model also provides a zoom lock to maintain a fixed magnification for calibrated measurement applications. The nose cone provides a built-in ring-light adapter, as well as inner threading for auxiliary lenses and other attachments. The sturdy single-arm boom stand provides a stable and flexible support system. The single-arm boom stand allows one to turn the microscope head around two different axes, letting you point microscope head in various directions. Especially convenient for quality-control inspections, teaching demonstrations, and many other industry applications, your colleagues or students can simultaneously view clear images shown through the trinocular port while you work through the eyepieces.