Canon Patents

Patent: A New Canon EF 300mm f/2.8L IS

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We posted a couple of days ago that Canon was well into the development of new “big white” lenses. The first patent for a new optical formula has appeared for an EF 300mm f/2.8L IS.

Patent Publication No. 2016-173439 (Google Translated)

  • Published 2016.9.29
  • Filing date 2015.3.17
  • Focal length 292.46
  • F-number 2.91
  • Angle of view 4.23
  • Image height 21.64
  • Overall length of the lens 273.95
  • BF 60.81

We don’t expect to see the supertelephoto lenses updated until at least 2018.

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