SMZ-171-BP Greenough zoom optical system Binocular head, 45º inclined, 360º rotating Widefield adjustable eyepieces N-WF10X/23mm 6.7:1 Zoom ratio, WD=110mm Objective magnification range: 0.75X-5X Pole type plain stand and head holder Coarse focusing system with tension adjustment Black/White stage plate and dust cover