Nikon patent for 18mm f/1.8, 20mm f/1.8 FX lenses

Nikon 18mm f/1.8 lens patent

Nikon 18mm f/1.8 lens patent

Nikon filed a patent 2012-27450 in Japan for a 18mm f/1.8 and 20mm f/1.8 full frame lenses:

  • Focal length: 18.4mm
  • Aperture: 1.84
  • Angle of view: 100.3deg
  • Lens design: 14 elements in 11 groups
  • 3 aspherical elements
  • 3 ED elements

Nikon 20mm f/1.8 lens patent

Nikon 20mm f/1.8 lens patent

  • Focal length: 20.4mm
  • Aperture: 1.84
  • Angle of view: 94.7deg
  • Lens design: 12 elements in 9 groups
  • 3 aspherical elements
  • 4 ED elements

It is typical for Nikon to patent several slightly different versions of each lens.

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