
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