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Eepiece magnification: 12.5X Alf wide-angle eyepiece Focal length of objective lens: 200mm Working distance: 192.74mm Primary mirror magnification: 5X--25X, electric/manual continuous poleless doubling Field of view diameter: 11mm-82.5mm Visual adjustment range: ±6D Pupil distance adjustment range: 55mm-75mm Illuminating source: four groups of light sources, using 15V/150W, cold light coaxial lighting German OSRAM halogen lamp, four level dimming Coaxial illumination: ≥50000LX Horizontal arm extension radius: ≥1230mm Vertical adjustment range: ≥550mm Fine tuning speed and stroke:≤1.5mm/s,≥40mm X/Y coordinate moving speed and range: ≤1.5mm/s, ≥40mm Power supply voltage and frequency: 220V+10% 50Hz
