Third Party Lenses

Patent: Sigma 11-22mm f/4.5-5.6 Art Lens

Sigma has filed an optical formula patent for an 11-22 f/4.5-5.6 Art series lens for full frame DSLRs.

Patent Publication No. 2015-203734 (Google Translated)

  • Published 2015.11.16
  • Filing date 2014.4.11
  • 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

An ultra wide angle full frame Art series lens from Sigma has been rumored for quite some time and is a logical addition to their Art series lineup.

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