Nikon 58mm f/1.4 lens patent

Nikon 58mm F1.4 lens patent

Nikon latest patent filed in Japan is for a 58mm f/1.4 lens:

  • Patent application: 2013-19993
  • Patent release date: January 31, 2013
  • Patent filing date: July 8, 2011
  • Focal length: 58.0216mm
  • Aperture: 1.450
  • Half angle of view: 20.82°
  • Image height: 21.6mm
  • Lens length: 93.67772mm
  • Backfocus: 38.71868mm
  • Lens design: 9 elements in 5 groups, two aspherical elements

Egami published a list of all 50 and 58mm Nikon patents filed in the past few years:

Patent date Lens Patent application
August, 2007 50 mm f/1.4 JP-A 2009-058651
February, 2008 50 mm f/1.4 JP-A 2009-192996
July, 2008 50mm f/1.4, 50mm f/1.2 JP-2010-14895, 2010-014897, 2010-072359
November, 2009 50mm f/1.2, 50mm f/1.4 JP-A 2011-113052
April, 2011 50 mm f/1.2 , 60 mm f/1.2 JP-A 2012-220754
April, 2011 58mm f/1.2 JP-2012-230340,2012-230133
June, 2011 58mm f/1.2 JP-A 2013-11831
July, 2011 58mm f/1.2 JP-A 2013-19992
July, 2011 58mm f/1.4 JP-2013-19993,2013-19994
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