Features
Glass optical material.
Horizontally graduated from center.
Includes quality control certificate of conformance.
Specifications
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Width:
1.594 inches
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Length:
2.468 inches
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Angle In Deg:
35.0 and 55.0
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Scale Calibration:
10-0-10 deg
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Axial Thickness:
0.120 inches
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Refraction Index:
Between 1.5150 and 1.5250
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Dispersion:
Between 50.0 angstroms and 70.0 angstroms
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Rim Finish:
Felt polished
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Graduations/markings:
Grid type
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Style Designator:
Horizontally graduated from center
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Supplementary Features:
Material optical glass per mil-g-174, class 1, grade a
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Fsc Application Data:
Viewfinder, aerial mapping and reconnaissance
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Federal Supply Class (fsc):
Optical instruments, test equipment, components and accessories
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National Stock Number (nsn):
6650-00-255-2633