Sony 50mm f/1.2 and f/1.4 lens patents

Sony filed a patent (2011-107450) in Japan for a 50mm f/1.4 and f/1.2 lenses:

Sony 50mm f/1.4 lens patent

Sony 50mm f/1.2 lens patent

Three different calculations were described in the patent:

  • Example 1
    • Focal length: 49.98mm
    • Aperture: 1.442
    • Half angle of view: 23.73°
    • One aspherical element
  • Example 2
    • Focal length: 51.54mm
    • Aperture: 1.443
    • Half angle of view: 23.17°
    • No aspherical elements
  • Example 4
    • Focal length: 51.55mm
    • Aperture: 1.233
    • Half angle of view: 23.02°
    • One aspherical element
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