| ELEMENT LEFT SURFACE RADIUS | -3.150 INCHES AND 4.911 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -1.418 INCHES |
| ABBE CONSTANT | 56.100 AND 29.300 |
| AXIAL THICKNESS | 0.886 INCHES NOMINAL AND 0.157 INCHES NOMINAL |
| BACK FOCAL LENGTH | 2.753 INCHES |
| COMPOUND LENS EDGE THICKNESS | 0.729 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 1.043 INCHES NOMINAL |
| COMPOUND LENS STYLE | DOUBLET |
| DIAMETER | 2.283 INCHES NOMINAL |
| EQUIVALENT FOCAL LENGTH | 2.998 INCHES |
| FRONT FOCAL LENGTH | 1.710 INCHES |
| FSC APPLICATION DATA | TELESCOPE,M69G,INTEGRATED WITH FIRE CONTROL EQUIP |
| 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 | 1.6970 NOMINAL AND 1.7200 NOMINAL |