Armorlite UnCoated CR-39® (Standard Index 1.498) Lens Blank Diameter: 75mm

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	7.3	15.0
1.50	1.51	350.993	0.89	6.00	8.7	15.0
3.00	3.04	174.342	1.80	6.00	8.7	13.0
4.50	4.56	116.228	2.72	6.00	8.9	11.0
6.25	6.31	83.994	3.81	6.00	7.5	7.0
8.25	8.35	63.473	5.13	6.00	10.9	7.0
10.00	10.14	52.268	6.37	6.00	14.5	7.0