Optical Instrument Lens

Features

Specifications

• Diameter:
  22.0 millimeters
• End Application:
  Rangefinder mk42
• Axial Thickness:
  4.0 millimeters and 2.0 millimeters
• Compound Lensaxial Thickness:
  6.0 millimeters
• Compound Lens Edge Thickness:
  6.0 millimeters
• Equivalent Focal Length:
  19.532 centimeters
• Back Focal Length:
  19.330 centimeters
• Front Focal Length:
  19.327 centimeters
• Refraction Index:
  1.6170 and 1.5185
• Abbe Constant:
  36.600 and 59.500
• Compound Lens Style:
  Doublet
• Individual Lens Style:
  Double convex and meniscus diverging
• Element Left Surface Radius:
  168.1 millimeters and -48.9 millimeters
• Element Right Surface Radius:
  48.9 millimeters and 151.6 millimeters
• Material:
  Glass, optical
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-157-4145