Optical Instrument Lens

Features

Specifications

• Diameter:
  29.0 millimeters
• End Application:
  Rangefinder mk42
• Axial Thickness:
  2.0 millimeters and 9.0 millimeters
• Compound Lensaxial Thickness:
  11.0 millimeters
• Equivalent Focal Length:
  7.250 centimeters
• Back Focal Length:
  7.456 centimeters
• Refraction Index:
  1.6490 and 1.5185
• Abbe Constant:
  33.800 and 59.600
• Compound Lens Style:
  Dialyte
• Individual Lens Style:
  Meniscus diverging and double convex
• Element Left Surface Radius:
  8565.0 millimeters and 28.2 millimeters
• Element Right Surface Radius:
  -28.2 millimeters and 28.7 millimeters
• Material:
  Glass, optical, jan-g-174
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-157-4139