... .7X-4.5X Observation tube: hinge binocular , 45 ° tilt , pupil distance :55- 75mm Hinge Trinocular : 45 ° tilt, pupil distance :55-75mmDiopter : Binocular ... . Phoenix binocular stereological microscope XTL -165 - VB continuous variable 7-45 timeslook up and down the chip