| ELEMENT LEFT SURFACE RADIUS | -1.794 INCHES AND 1.575 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -1.794 INCHES AND 5.708 INCHES |
| ABBE CONSTANT | 60.300 AND 29.300 |
| BACK FOCAL LENGTH | 3.509 INCHES |
| AXIAL THICKNESS | 0.575 INCHES NOMINAL AND 0.097 INCHES NOMINAL |
| COMPOUND LENS EDGE THICKNESS | 0.313 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.672 INCHES NOMINAL |
| COMPOUND LENS STYLE | DOUBLET |
| DIAMETER | 1.610 INCHES NOMINAL |
| EQUIVALENT FOCAL LENGTH | 4.174 INCHES |
| FRONT FOCAL LENGTH | 2.837 INCHES |
| FSC APPLICATION DATA | TELESCOPE INTEGRATED WITH FIRE CONTROL EQUIP |
| 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 | 1.6200 NOMINAL AND 1.7200 NOMINAL |