Nikon 58mm f/1.4 lens patent

• 11 years ago
• Categories: Nikon Lenses, Nikon Patents
• Tags: Nikon AF-S NIKKOR 58mm f/1.4G lens

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