The PB-100A compound binocular microscope comes with an infinity Plan optical system. It is a research grade microscope, suitable for high school, university, hospital, research institutions. Its crystal clear optical and precise mechanical systems. 30 degree incline and 360 degree rotation binocular head with WF10X and WF16X pplan eyepieces, provides eight levels of magnification 40X, 64X, 100X, 160X, 400X, 640X, 1000X and 1600X. The backward nosepiece design allows spacious room for convenient operation.a LEDillumination system,a coaxial coarse & fine focusing system, and a 3D mechanical stage,A NA 1.25 NA Abbe condenser with iris diaphragm, A Kohler illumination system with 3W LED. It is an ideal instrument for advanced researches.