Armorlite UnCoated CR-39® (Standard Index 1.498) Lens Blank Diameter: 70mm

Nominal Curve	True Curve	Radius mm	SAG at 50mm	Nominal Concave	Center Thickness	Edge Thickness
0.50	0.52	1019.231	0.31	6.00	11.4	18.0
1.50	1.51	350.993	0.89	6.00	12.5	18.0
3.00	3.04	174.342	1.80	6.00	8.8	12.5
4.50	4.56	116.228	2.72	6.00	10.7	12.5
6.25	6.31	83.994	3.81	6.00	8.4	8.0
8.25	8.35	63.473	5.13	6.00	11.3	8.0
10.00	10.14	52.268	6.37	6.00	14.3	8.0