The PXS-EX model is a trinocular continuous zoom stereo microscope that can observe and magnify small objects with three eyes, with high resolution, high definition, and strong stereoscopic sense. It has the characteristics of long working distance, wide field of view, good image quality, etc. With a simple operation, you can obtain a fixed magnification or a continuous zoom image of 0.63X-5X, and you can choose between epi-illumination and transmitted illumination when observing samples, and the application field and range are quite wide. The PXS-EX tri-eye tube can be connected to a CCD camera or digital camera without affecting visual observation, and can be connected to a computer, monitor, and TV through a video terminal, and can also be configured with software with various functions to become an image analysis stereo microscope. This instrument has reliable performance, easy operation and beautiful appearance, which can not only be used for teaching demonstration, biological anatomy, observation and analysis of public security departments, but also widely used in the electronic industry, precision parts assembly and calibration, and various inspections in agriculture.