Optical Instrument Lens

Features

Specifications

• Diameter:
  Between 1.29803 inches and 1.29921 inches
• Axial Thickness:
  0.22047 inches
• Equivalent Focal Length:
  3.02598 inches
• Back Focal Length:
  2.97558 inches
• Front Focal Length:
  2.92992 inches
• Refraction Index:
  1.5171
• Abbe Constant:
  64.500
• Single Lens Style:
  Double convex
• Individual Lens Style:
  Double convex
• 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:
  Fire control instrument levels optical sighting and rangine
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-585-1851