Technical Specifications of NSN
Axial Thickness:
0.3662 inches and 0.0866 inches
Compound Lensaxial Thickness:
Between 0.429 inches and 0.469 inches
Compound Lens Edge Thickness:
0.281 inches
Equivalent Focal Length:
2.603 inches
Back Focal Length:
2.491 inches
Refraction Index:
1.5170 and 1.6490
Abbe Constant:
64.500 and 33.800
Compound Lens Style:
Doublet
Individual Lens Style:
Double convex and meniscus diverging
Element Left Surface Radius:
1.9405 inches and -1.1957 inches
Element Right Surface Radius:
-1.1957 inches and -2.7240 inches
Material:
Glass, optical, mil-g-174, class 1, grade c
Material Specification:
Mil-g-174, class 1, grade c military specification single material response
Fsc Application Data:
Sight periscope m25, integrated with fire control equipment
Item Name:
Objective Lens
Other Related Parts
No other part numbers with same form, fit, and function found.