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Friday, October 7, 2016

New Canon Patent - EF 300mm f/2.8L IS Lens

Canon EF 300mm f/2.8L IS II lens

A new patent for the Canon EF 300mm f/2.8L IS lens has been uncovered. This may be the beginning of the Series III version of this venerable lens.

I reported recently Canon is reworking the entire line of their Super Telephoto lens with the approaching 2020 Summer Olympics Games in Tokyo in mind. The current EF 300mm f/2.8L IS II is one of the sharpest lens around and a favorite of mine for wildlife photography. You can see my equipment bag and works on

Patent Publication No. 2016-173439 (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

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