| ELEMENT LEFT SURFACE RADIUS | -98.717 INCHES AND 1.376 INCHES |
| ELEMENT RIGHT SURFACE RADIUS | -98.717 INCHES AND -0.910 INCHES |
| ABBE CONSTANT | 57.400 AND 33.800 |
| AXIAL THICKNESS | 0.468 INCHES NOMINAL AND 0.295 INCHES NOMINAL |
| BACK FOCAL LENGTH | 5.124 INCHES |
| COMPOUND LENS EDGE THICKNESS | 0.884 INCHES NOMINAL |
| COMPOUND LENS OVERALL AXIAL THICKNESS | 0.768 INCHES NOMINAL |
| COMPOUND LENS STYLE | DOUBLET |
| DIAMETER | 1.343 INCHES NOMINAL |
| EQUIVALENT FOCAL LENGTH | 6.390 INCHES |
| FSC APPLICATION DATA | PERISCOPE,INTEGRATED WITH FIRE CONTROL EQUIPMENT |
| INDIVIDUAL LENS STYLE | PLANO-CONVEX AND PLANO-CONCAVE |
| LENGTH | 0.884 INCHES NOMINAL |
| MATERIAL DOCUMENT AND CLASSIFICATION | JAN-G-174, GRADE C MIL SPEC SINGLE MATERIAL RESPONSE |
| MATERIAL | GLASS OPTICAL |
| REFRACTION INDEX | 1.5725 NOMINAL AND 1.6490 NOMINAL |