XDS-1 Inverted biological microscope is equipped long working distance plan achromatic objectives, wide field plan eyepieces and adjustable condenser. The product structure is compact and the design of operation part is in reason, so that the operator feel easy and comfort. This is ideal optical instrument for micro observation in cell tissue and transmitted liquid tissue, even in dynamic observation in the culture dish tissue. It can be used in scientific research, universities, medical treatment, epidemic prevention, agriculture and etc.