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Sigma Lens Patent 11-22mm ART Lens with Variable Aperture

sigma 11-22mm lens patent imgSigma latest patent surfaced over the web that shows a 11-22mm ART lens patent, but surprisingly the lens features variable aperture being a ART lens.

Description, self-interpretation of the patent literature

  • Patent Publication No. 2015-203734
    • Published 2015.11.16
    • Filing date 2014.4.11
  • Example 1
    • Zoom ratio 1.88
    • Wide-angle intermediate telephoto
    • Focal length 11.33 15.33 21.30
    • F-number 4.50 5.00 5.86
    • Total angle of view 2ω 126.85 108.80 87.93
    • Image height Y 21.63 21.63 21.63
    • Overall length of the lens 163.42 156.24 156.59

See more Sigma Patents

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