Technical Specifications of NSN
Diameter:
Between 38.7 millimeters and 39.2 millimeters
End Application:
Rangefinder mk57
Axial Thickness:
8.2 millimeters and 4.0 millimeters
Compound Lensaxial Thickness:
12.2 millimeters
Equivalent Focal Length:
36.360 centimeters
Back Focal Length:
36.400 centimeters
Front Focal Length:
35.040 centimeters
Refraction Index:
1.5170 and 1.6210
Abbe Constant:
64.800 and 36.200
Compound Lens Style:
Doublet
Individual Lens Style:
Double convex and meniscus diverging
Element Left Surface Radius:
186.2 millimeters and -155.5 millimeters
Element Right Surface Radius:
155.5 millimeters and 1001.8 millimeters
Material:
Glass, optical, jan-g-174
Material:
Glass, optical, jan-g-174
Other Related Parts
Part Number
Cage
RNCC
RNVC
RNAAC
Status
MSDS
SADC