Signet Uncoated Standard Resin
(Standard Index 1.498)
Lens Blank Diameter: 70mm
Nominal Curve True Curve Radius mm Actual SAG at 50mm Nominal Concave Center Thickness Edge Thickness

0.50

0.42

6.75

9.4

17.0

2.00

2.03

6.75

8.8

14.5

4.25

4.27

6.75

8.0

11.0

5.25

5.17

6.75

9.1

11.0

6.25

6.17

6.75

10.3

11.0

7.25

7.17

6.75

7.0

7.0

8.25

8.17

6.75

10.3

7.5

9.25

9.17

6.75

10.0

6.8

10.25

10.25

6.75

13.7

7.5