Left or right PD 

24 ~ 40mm

Minimum graduated value

1mm

Dividing disc axial graduation

Left dividing disc

1200 ~ 00 ~ 1350

Right dividing disc

450 ~ 1800 ~ 600

Axial graduation increases along the lens frame axis counter clockwise, and the graduated distance is 50.

Inner diameter of lens frame

F32.5mm

Number of lens which can be inserted into left or right lens frame simultaneously

4 pieces

Degree of lens rotating around optical axis in the lens frame

3600

Nonparallelism between lens´ optical axis and lens frame´s geometric axis

≤2.50

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

00 ~ 300

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