| ELEMENT LEFT SURFACE RADIUS | -2.559 INCHES AND 2.559 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -2.559 INCHES AND 28.346 INCHES |
| ABBE CONSTANT | 64.500 AND 29.300 |
| BACK FOCAL LENGTH | 8.061 INCHES |
| AXIAL THICKNESS | 0.768 INCHES NOMINAL AND 0.177 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.614 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.945 INCHES NOMINAL |
| COMPOUND LENS STYLE | DOUBLET |
| DIAMETER | 2.518 INCHES MINIMUM AND 2.520 INCHES MAXIMUM |
| EQUIVALENT FOCAL LENGTH | 9.229 INCHES |
| FRONT FOCAL LENGTH | 9.736 INCHES |
| FSC APPLICATION DATA | 1. FIRE CONTROL COMPUTING SIGHTS AND DEVICES |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND DOUBLE CONCAVE |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | GLASS OPTICAL |
| REFRACTION INDEX | 1.5170 NOMINAL AND 1.7200 NOMINAL |