Features and specifications:

• 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.

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