| BMSH |
DISPERSION |
64.000 ANGSTROMS MINIMUM AND 65.000 ANGSTROMS MAXIMUM |
| AGYE |
SURFACE FINISH |
POLISHED |
| AJEF |
BEVEL DEPTH |
0.510 MILLIMETERS MAXIMUM |
| ABRY |
LENGTH |
62.740 MILLIMETERS MINIMUM AND 63.240 MILLIMETERS MAXIMUM |
| ABGL |
WIDTH |
24.9 MILLIMETERS MINIMUM AND 25.4 MILLIMETERS MAXIMUM |
| MATL |
MATERIAL |
GLASS, OPTICAL, JAN-G-174, TYPE 517-645, GRADE C |
| BMSP |
BEVEL ANGLE IN DEG |
45.000 NOMINAL |
| BMSM |
POLISHED PERIPHERY |
NOT PROVIDED |
| BMSG |
POLISHED SURFACE |
BOTH |
| ABNM |
THICKNESS |
4.800 MILLIMETERS MINIMUM AND 5.200 MILLIMETERS MAXIMUM |
| BMMX |
REFRACTION INDEX |
1.5160 MINIMUM AND 1.5180 MAXIMUM |
| ZZZV |
FSC APPLICATION DATA |
SIGHT PERISCOPE T42 |
| BMSK |
REFLECTION REDUCING SURFACE |
BOTH |
| FEAT |
SPECIAL FEATURES |
CORNERS ROUNDED 0.237IN. MAX 0.197IN. MIN. RADIUS; RESOLVING POWER TO BE 30 SEC OF ARC OR BETTER AS USED WHENSCANNING CLEAR APERTURE WITH A TELESCOPE OF AT LEAST A 0.5IN. APERTURE; LIGHT DEVIATION NOT TO EXCEED PLUS OR MINUS 2 MIN OF ARC; SPHERICAL POWER NOT TOEXCEED 7 MILLIDIOPTERS; ASTIGMATISM NOT TO EXCEED 3 MILLIDIOPTERS; SURFACE QUALITY 80-50 |