Optical Instrument Lens

Features

Specifications

• Diameter:
  17.0 millimeters
• End Application:
  Rangefinder mk42
• Axial Thickness:
  2.0 millimeters and 4.0 millimeters
• Compound Lensaxial Thickness:
  6.0 millimeters
• Compound Lens Edge Thickness:
  5.0 millimeters
• Equivalent Focal Length:
  87.480 centimeters
• Back Focal Length:
  87.500 centimeters
• Front Focal Length:
  84.560 centimeters
• Refraction Index:
  1.6158 and 1.5408
• Abbe Constant:
  36.800 and 51.200
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double concave and double convex
• Element Left Surface Radius:
  -154.0 millimeters and 18.9 millimeters
• Element Right Surface Radius:
  -18.9 millimeters and 47.6 millimeters
• Material:
  Glass, barium flint
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-382-0924