Aven Binocular Body Microscope is a high-quality microscope designed for professional use. With a magnification range of 6.7x-50x this microscope provides clear and detailed images for various applications. Specifications Body Type - Binocular 360° rotatable 45° inclined eyepiece tube. Eyepieces - Two 10x(FN23) eyepieces supplied with microscope body. Optional 15x(FN15) and 20x(FN11.4) available to extend magnification range. Auxiliary lens - 0.5x 0.75x 1.6x and 2x auxiliary lenses available to extend the magnification range of the microscope. Working Distance - 108 mm. without auxiliary lens 240 mm. with 0.5x auxiliary lens 132 mm. with 0.75x auxiliary lens 50 mm. with 1.6x auxiliary lens 41 mm. with 2x auxiliary lens. Zoom Ratio - 7.46:1. Diopter Adjustment - On both eye tubes: +5.6D-0.72D. Interpupillary Distance - Adjustable from 52 to 75 mm. Optical System - Greenough. Item Weight - 4 lbs. - SKU: AVEN680