BS-3090 is a research level zoom stereo microscope with infinite parallel Galileo optical system. Based on Galileo optical system and Apochromatic objective, it can provide real and perfect microscopic images on details. The excellent ergonomics and user-friendly operating system can truly allow users to experience a simple and comfortable work. The zoom ratio is 18:1, with 10× eyepiece, the magnification range is 7.5×-135×. BS-3090 can meet the research demands of life sciences, biomedicine, microelectronics, semiconductors, materials science and other fields of research needs.