1) pupil distance adjustment range: binocular pupil distance 48 ~80mm, left or right pupil distance 24 ~40 mm; Minimum scale value 1mm 2) the axial scale of the dividing disk is 130 °~ 0 °~ 120 °on the left and 50 °~ 180 °~ 60 °on the right. The axis scale increases counterclockwise along the axis of the mirror frame. The effective internal aperture of the frame is 5 ° 3) Effective internal aperture of mirror frame: 33.5mm 4) Number of lenses inserted when left or right frames are used: 5pieces (front 3 rear 2) 5) the lens rotates around the optical axis in the inner circle of the lens frame is 360 ° 6) the lens optics The unparallelism between the axis and the geometric axis of the frame: ≤ 2.5 ° 7) the difference between the optical center and the geometric center of the lens: ≤ 0.5mm 8) the displacement of the lens relative to the geometric center of the frame: ≤ 0.3 mm 9) nose Range of adjustment: adjustable length: 0 ≤ 22 mm; Angle: 360 ° 10) adjustable length range of left or right foot: 0~20mm 11) weight: 52g
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