Ball bearing V-Ways for long-life, smooth, sensitive focusing control.
Dependable center control focusing mechanism.
Dual measuring drums are calibrated in both Diopters and Millimeters for added convenience.
Diopter range 36.00 to 52-00D Millimeter Range 6.60mm to 9.40mm.
Soft, uniform 15 watt illumination.
Internal fixation target.
45D calibration test lens included.