Specification XSZ-N21 XSZ- N21B XAX- N21E Viewing Head Monocular Inclined at 45°,360°Rotatble ● Sliding Binocular Head, Inclined at 45°(55mm-75mm) ● Sliding Trinocular Head, Inclined at 45(55mm-75mm) ● Eyepiece WF10×/18mm ● ● ● Objective Achromatic 4×、10×、40×(s)、100×(s)Oil