... eyepiece: 10X, 12.5X,the field diameter: 18mm, 15 mm2, Objective: achromatic lens: 10X/0.25, 100X/1.25semi-flat-field ... lens: 40X/0.65working distance: 7.31 mm, 0.66 mm, ... : 12, binocular tube: 13,10 X, 12.5X eyepiece: 14, objective lens 10X,, 40X, 100X (oil):15,setting bolt spring on the ...