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Canon Patent for 9-18mm Ultra-Wide Angle Lens for EOS M


Egami (translated) spotted a patent for an EF-M 9-18mm f/3.5-4.5 STM lens for the EOS M system. A bit weird since there is already the excellent EF-M 11-22mm f/4-5.6 IS STM lens. I guess this is just one of the many patents Canon is filing and not a lens that will hit the market anytime soon.

  • Patent Publication No. 2015-34892
    • Published 2015.2.19
    • Filing date 2013.8.9
  • Example 1
    • Zoom ratio 1.90
    • The focal length f = 9.22 14.67 17.50mm
    • Fno. 3.45 4.02 4.63
    • Half angle ω = 55.92 42.90 37.92 °
    • Image height Y = 13.63mm
    • Overall length of the lens 94.76 85.16 91.16mm
    • BF 13.06 15.35 13.60mm
    • Negative positive and negative positive 4-group zoom
    • Inner Focus (third group)
    • Video support
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