Armorlite UnCoated CR-39® (Standard Index 1.498) Lens Blank Diameter: 65mm

Nominal Curve	True Curve	Radius mm	Actual SAG at 50mm	Nominal Concave	Center Thickness	Edge Thickness
0.50	0.52	1019.231	0.31	6.00	10.3	16.6
1.50	1.51	350.993	0.89	6.00	9.5	14.5
3.00	3.04	174.342	1.80	6.00	11.0	14.5
4.50	4.56	116.228	2.72	6.00	8.0	10.0
6.25	6.31	83.994	3.81	6.00	7.0	7.0
8.25	8.35	63.473	5.13	6.00	9.0	7.0
10.00	10.14	52.268	6.37	6.00	11.5	7.0
12.00	11.77	45.030	7.58	6.50	13.6	6.5
13.50	13.45	39.405	8.95	6.50	17.1	6.5
15.00	14.97	35.404	10.34	3.00	18.5	6.5
16.50	16.49	32.141	11.94	3.00	19.5	6.5