| specifications: | Range of PD adjustments:
PD of both eyes: 48 ~ 80mm
left or right PD: 24 ~ 40mm
Minimum graduated value: 1mm
Dividing disc axial graduation:
Left dividing disc:
120degree~0degree~135 degree
Right dividing disc:
45degree~180degree~60degree
Axial graduation increases along the lens frame axis counter clockwise,and the graduated distance is 50.
Inner diameter of lens frame:
32.5mm.
Number of lens which can be inserted into left or right lensframe simultaneously:
4 pieces
Degree of lens rotating around optical axis in the lens frame:
360 degree.
Nonparallelism between lens´optical axis and lens frame´s geometric axis:
≤2.5 degree.
Non-concentricity between lens´optical center and lens frame geometric center:
≤0.5mm.
Displacement of lens in relation to position of lens frame geometric center:
≤0.3mm.
Range of nose rest adjustment: Length:0 ~ 14mm;
angle:0 degree ~ 30 degree
Range of left or right lens frame leg´s length adjustment:
98 ~ 135mm.
Maximum interval between left and right lens frame legs:200mm.
Weight:70g
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