... ° Binocular tube Magnification Manual 3-step changer, total magnification 6x, 10x, 16x; Field of view Φ34mm, Φ20mm, Φ13mm Coaxial assistant's ... binocular tube Manual 3-step changer, total magnification 6x, 10x, 16x; Field of view Φ34mm, Φ20mm, Φ13mm Coaxial illumination Illumination ...