| ELEMENT LEFT SURFACE RADIUS | 5.122 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | 2.785 INCHES |
| ABBE CONSTANT | 63.500 AND 36.600 |
| AXIAL THICKNESS | 0.394 INCHES NOMINAL AND 0.177 INCHES NOMINAL |
| BACK FOCAL LENGTH | 7.348 INCHES |
| COMPOUND LENS EDGE THICKNESS | 0.406 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.571 INCHES NOMINAL |
| COMPOUND LENS STYLE | DOUBLET |
| DIAMETER | 2.048 INCHES NOMINAL |
| EQUIVALENT FOCAL LENGTH | 7.598 INCHES |
| FSC APPLICATION DATA | BINOCULAR,FIRE CONTROL |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND MENISCUS DIVERGING |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | GLASS OPTICAL |
| REFRACTION INDEX | 1.5110 NOMINAL AND 1.6170 NOMINAL |