The Konus College 600X Biological Monocular Microscope is a professionally designed student microscope that includes a 15x wide field eyepiece and three interchangeable achromatic objectives (4x, 10x, 40x). It incorporate a rack and pinion focusing system with micrometrical and macro metrical adjustment, and illumination is provided by a Concave sub-stage mirror and illumination control is provided by a light condenser lens, with iris diaphragm and filter-holder.