SMZ171BLED, Optical system Greenough Observation tube Binocular head Inclination 45º inclined Interpupillary distance 52-75mm
SMZ168_BLED, 35º inclined, 360º rotating Interpupillary distance 54-76mm Diopter adjustment On both tubes, +/- 5 diopter Eyepieces Widefield WF10X/23mm