Optical Instrument Lens

Features

Specifications

• Diameter:
  Between 4.195 inches and 4.199 inches
• Axial Thickness:
  Between 0.318 inches and 0.322 inches
• Equivalent Focal Length:
  -13.504 inches
• Back Focal Length:
  -13.585 inches
• Front Focal Length:
  -13.613 inches
• Single Lens Style:
  Double concave
• Element Left Surface Radius:
  -21.541 inches
• Element Right Surface Radius:
  -16.005 inches
• Material:
  Glass, optical, mil-g-174, class 1, grade a
• Material Specification:
  Mil-g-174, class 1, grade a military specification single material response
• Fsc Application Data:
  Target designator
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-01-073-1738