Optical Instrument Lens

Features

Specifications

• Diameter:
  20.0 millimeters
• End Application:
  Rangefinder mk45
• Axial Thickness:
  3.0 millimeters and 1.2 millimeters
• Compound Lensaxial Thickness:
  4.2 millimeters
• Compound Lens Edge Thickness:
  4.0 millimeters
• Equivalent Focal Length:
  41.718 centimeters
• Refraction Index:
  1.5125 and 1.6170
• Abbe Constant:
  60.500 and 36.600
• Compound Lens Style:
  Dialyte
• Individual Lens Style:
  Double convex and double concave
• Element Left Surface Radius:
  153.7 millimeters and -175.9 millimeters
• Element Right Surface Radius:
  179.3 millimeters and -2090.2 millimeters
• Material:
  Glass
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-131-0674