Biological Microscope LBM-B20 has design of Compensation free, trinocular 30° inclined 360° rotation viewing head, interpupillary distance 48 to 75 mm. Features infinite plan objectives 4X, 10X, 20X, 40X (s), 100X(s, oil). Microscope design also offers quintuple nosepiece, built-in Koehler 3W LED illuminator system, N.A. 1.25 condenser with diopter adjustable. Coaxial coarse and fine focusing adjustment.