| ELEMENT LEFT SURFACE RADIUS | 17.281 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | 1.897 INCHES |
| ABBE CONSTANT | 64.500 AND 29.300 |
| AXIAL THICKNESS | 0.414 INCHES NOMINAL AND 0.125 INCHES NOMINAL AND 0.564 INCHES NOMINAL |
| BACK FOCAL LENGTH | 10.107 INCHES |
| COMPOUND LENS EDGE THICKNESS | 0.812 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 1.103 INCHES NOMINAL |
| COMPOUND LENS STYLE | TRIPLET |
| DIAMETER | 1.984 INCHES NOMINAL |
| EQUIVALENT FOCAL LENGTH | 9.575 INCHES |
| FSC APPLICATION DATA | TELESCOPE,INTEGRATED WITH FIRE CONTROL EQUIPMENT |
| INDIVIDUAL LENS STYLE | PLANO-CONVEX AND PLANO-CONCAVE AND DOUBLE CONVEX |
| 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 |