Optical Instrument Lens

Features

Specifications

• Diameter:
  Between 1.298 inches and 1.299 inches
• Axial Thickness:
  0.417 inches and 0.091 inches
• Compound Lensaxial Thickness:
  0.508 inches
• Compound Lens Edge Thickness:
  0.395 inches
• Equivalent Focal Length:
  8.476 inches
• Back Focal Length:
  7.580 inches
• Front Focal Length:
  9.109 inches
• Refraction Index:
  1.5171 and 1.7200
• Abbe Constant:
  64.500 and 29.300
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and double concave
• 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:
  Range finder, fire control
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-618-9398