| ELEMENT LEFT SURFACE RADIUS | -2.047 INCHES AND 3.226 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -2.047 INCHES AND -6.169 INCHES |
| ABBE CONSTANT | 58.800 AND 29.300 |
| AXIAL THICKNESS | 0.512 INCHES NOMINAL AND 0.118 INCHES NOMINAL |
| BACK FOCAL LENGTH | 3.920 INCHES |
| COMPOUND LENS EDGE THICKNESS | 0.263 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.630 INCHES NOMINAL |
| COMPOUND LENS STYLE | DOUBLET |
| DIAMETER | 2.046 INCHES MINIMUM AND 2.047 INCHES MAXIMUM |
| EQUIVALENT FOCAL LENGTH | 4.034 INCHES |
| FRONT FOCAL LENGTH | 3.752 INCHES |
| FSC APPLICATION DATA | OPTICAL SIGHTING AND RANGING EQUIPMENT |
| INDIVIDUAL LENS STYLE | DOUBLE CONVEX AND MENISCUS DIVERGING |
| MATERIAL DOCUMENT AND CLASSIFICATION | MIL-G-174, CLASS 1, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | GLASS OPTICAL |
| REFRACTION INDEX | 1.6111 NOMINAL AND 1.7200 NOMINAL |