... operation. They are the essential instruments for gynecologic examination.YDJ II-1D Colposcope:Observation angle: 45° tiltedMagnification of eyepiece: 16XFocal length ... of objective: F=230mm & F=280mmMagnification changer: 5-step: 0.4X, 0.66X, 1X, 1.5X, 2.5XTotal Magnification: 2.9X ... fitted on the round base with 3 jaws Colposcope (YDJ II-1D)