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Firmware Update

Sigma patents 25 mm F1.4 M4/3 Lens

Sigma patent a 25 mm F1.4 micro four third lens, the patent is spotted by patent hunting blog Egami.

Patent Details

  • Patent Publication No. 2013-3324
    • 2013.1.7 Release Date
    • Filing date 2011.6.16
  • Example 2
    • Focal length f = 25.00mm
    • Fno. 1.44
    • 2ω = 48.61 ° angle of view
    • Nine lens elements in 7 groups configuration
    • Two three-sided aspherical
    • (More than n = 2.00) one high refractive index glass
    • Four groups of positive and negative positive negative
    • Inner Focus (group 3)