| ELEMENT LEFT SURFACE RADIUS | 41.680 MILLIMETERS |
| ELEMENT RIGHT SURFACE RADIUS | 1.635 INCHES |
| ABBE CONSTANT | 60.500 AND 42.500 |
| AXIAL THICKNESS | 0.671 INCHES NOMINAL AND 0.158 INCHES NOMINAL |
| BACK FOCAL LENGTH | 10.076 INCHES |
| COMPOUND LENS EDGE THICKNESS | 0.375 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.829 INCHES NOMINAL |
| COMPOUND LENS STYLE | DOUBLET |
| DIAMETER | 1.718 INCHES NOMINAL |
| EQUIVALENT FOCAL LENGTH | 10.107 INCHES |
| FSC APPLICATION DATA | TELESCOPE,M69G,INTEGRATED WITH FIRE CONTROL EQUIPMENT |
| INDIVIDUAL LENS STYLE | PLANO-CONVEX AND MENISCUS DIVERGING |
| MATERIAL DOCUMENT AND CLASSIFICATION | JAN-G-174, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | GLASS OPTICAL |
| REFRACTION INDEX | 1.5125 NOMINAL AND 1.5725 NOMINAL |