| ELEMENT LEFT SURFACE RADIUS | -1.642 INCHES AND 2.071 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -2.071 INCHES AND 1.928 INCHES |
| AXIAL THICKNESS | 0.132 INCHES NOMINAL AND 0.794 INCHES NOMINAL |
| BACK FOCAL LENGTH | 16.371 INCHES |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.926 INCHES NOMINAL |
| COMPOUND LENS STYLE | DOUBLET |
| DIAMETER | 2.296 INCHES NOMINAL |
| EQUIVALENT FOCAL LENGTH | 12.792 INCHES |
| FRONT FOCAL LENGTH | 10.228 INCHES |
| FSC APPLICATION DATA | NIGHT VISION EQUIPMENT |
| INDIVIDUAL LENS STYLE | DOUBLE CONCAVE AND DOUBLE CONVEX |
| LENGTH | 1.148 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174 MIL SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | GLASS OPTICAL |
| REFRACTION INDEX | 1.5460 NOMINAL AND 2.2160 NOMINAL |
| SPECIAL FEATURES | EDGES BLACKENED PER SC-B-614594 |
| SPECIAL TEST FEATURES | MEETS MIL-O-13830 SPECIFICATIONS |
| SUPPLEMENTARY FEATURES | POLISHED SURFACES; GROUND EDGES |