Optical Instrument Lens

Features

Specifications

• Diameter:
  43.0 millimeters
• End Application:
  Periscope mk20
• Axial Thickness:
  4.3 millimeters
• Equivalent Focal Length:
  21.820 centimeters
• Back Focal Length:
  21.530 centimeters
• Front Focal Length:
  21.820 centimeters
• Refraction Index:
  1.5110
• Abbe Constant:
  63.400
• Single Lens Style:
  Plano-convex
• Element Left Surface Radius:
  111.5 millimeters
• Element Right Surface Radius:
  0.0 millimeters
• Material:
  Glass, borosilicate crown
• Federal Supply Class (fsc):
  Optical instruments, test equipment, components and accessories
• National Stock Number (nsn):
  6650-00-155-1614