New Sigma Patent: Sigma 25mm f/1.2 lens for MFT Cameras

Sigma has filed a new patent in Japan: Sigma 25mm f/1.2 lens. This new lens is designed for Micro Four Thirds cameras.

Sigma 25mm f/1.2 is a bright wide-angle prime lens for Micro Four Thirds cameras. And Sigma has most likely designed this lens for Olympus. But we have to underline that it is just the patent application, so this lens will Not be available on the market in the near future.

See the Patent details:

Explanation self interpretation of patent literature

  • Patent Publication No. 2015-75501
    • Published 2015.4.20
    • Filing date 2013.10.4
  • Example
    Example Focal distance Fno. Total angle of view
    One 24.53 1.82 48.10
    Two 25.00 1.80 47.37
    Three 30.00 1.81 39.62
    Four 17.12 1.82 64.97
    Five 24.53 1.80 47.01
    Six 24.53 1.20 47.06

    Image height Y = 10.80mm

  • Sigma patents
    • 3-group configuration of positive positive and negative
    • Inner focus (the second group)

via: Egami