Biological Microscope FM-BM-C101 offers infinity plane achromatic optical system F = 200 mm. It has Siedentopf Trinocular Head, Inter-pupillary distance 52 to 75 mm, 30° inclined, trinocular light is split 50/50 by a high quality prism. Designed with infinite achromatic objectives 4X/0.13, 10X/0.30, 40X/0.70, 100X/1.25 (S, O) and a WF10X/18 mm eyepiece with the high point to provides better observation. Coarse and fine knob focusing with Division: 0.001 mm, Max: 20 mm. Swing type NA = 1.25 (O) with the Iris diaphragm with blue filter increases its quality of result.