ML11 is a biological microscope is the optimal instrument for medical treatment, teaching demonstration and scientific research. ML11 biological microscope appareled with plan achromatic objectives and wide field eyepieces, and it is convenient to operate. Using Kohler illumination with 6 Volt 20 Watt Halogen lamps with brightness control. It has minimum division of fine focusing with 2?m. Coaxial coarse/fine focus system, with tensional flexible and up stop. It can be view widely and clear. With wide field eyepieces and plan achromatic objectives.