The MHL2800 series biological microscopes are equipped with excellent infinite-distance flat-field achromatic objectives and wide-field eyepieces, providing clear imaging and a broad field of view. Featuring an ergonomic design that meets human engineering standards, it includes a low-positioned focusing knob, an inward-facing objective changer, and an integrated handle design for easier and more comfortable operation, greater space, and safer transportation of the instrument. The product is widely applicable in fields such as biology, medicine, industry, and agriculture, and is an ideal instrument for medical, educational, and research institutions.