Nikon filed a new patent today: the 58mm f/1.4 lens patent. See the detail of this lens patent below:
- 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
In past few years, Nikon has several 50mm and 58mm lens patents. Japanese website Egami collects all these lens patent below:
| 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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how about a 24-70mm with VRII !!!!!