Optical Instrument Lens

Features

Specifications

• Diameter:
  5.0 millimeters
• End Application:
  Rangefinder mk57
• Axial Thickness:
  2.2 millimeters and 1.1 millimeters
• Compound Lensaxial Thickness:
  3.3 millimeters
• Equivalent Focal Length:
  2.700 centimeters
• Back Focal Length:
  2.720 centimeters
• Front Focal Length:
  2.760 centimeters
• Refraction Index:
  1.5725 and 1.6170
• Abbe Constant:
  57.400 and 36.600
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and meniscus diverging
• Element Left Surface Radius:
  22.1 millimeters and -8.5 millimeters
• Element Right Surface Radius:
  8.5 millimeters and 30.7 millimeters
• Material:
  Glass, optical, jan-g-174
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-155-1764