| ELEMENT LEFT SURFACE RADIUS | -3.027 INCHES AND 1.398 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | 1.398 INCHES |
| ABBE CONSTANT | 36.600 AND 64.500 |
| AXIAL THICKNESS | 0.060 INCHES NOMINAL AND 0.539 INCHES NOMINAL |
| BACK FOCAL LENGTH | 8.315 INCHES |
| COMPOUND LENS EDGE THICKNESS | 0.481 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.599 INCHES NOMINAL |
| COMPOUND LENS STYLE | DOUBLET |
| DIAMETER | 1.467 INCHES NOMINAL |
| EQUIVALENT FOCAL LENGTH | 7.522 INCHES |
| FSC APPLICATION DATA | OBSERVATION INSTRUMENT M1 |
| INDIVIDUAL LENS STYLE | DOUBLE CONCAVE AND DOUBLE CONVEX |
| MATERIAL DOCUMENT AND CLASSIFICATION | JAN-G-174, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | GLASS OPTICAL |
| REFRACTION INDEX | 1.6170 NOMINAL AND 1.5170 NOMINAL |