This trinocular biological compound microscope features an infinity-corrected optical system with semi-plan achromatic lenses, and Koehler illumination. The extreme wide-field 10X eyepieces provide a large field-of-view (FN 22), along with additional 25X eyepieces for increased magnification. The backward nosepiece design leaves room for easy and convenient operation of the instrument. With four high-quality objective lenses (4x, 10x, 40x, 100x), the T570D can achieve magnifications of 40X, 100X, 120X, 300X, 400X, 1000X, 1200X, 3000X. It is an ideal instrument for advanced research organizations, laboratories (especially start-up labs), hospitals/clinics, and collegiate institutes.