The product is a simple coaxial illumination operation microscope for one man.It is portable,compact and applied in mobile hospi Eyepiece Magnification: 12.5X/18BEyepiece Magnification: 12.5X Objective lens:f=200 Working distance:190mm Magnification of main microscope: 5.3X,8X,12XDiameter of field:Ø38mm,Ø25mm,Ø17mmAdjustment of diopter:±7D Adjustable range for Pupil Distance: 50mm-80mm ...