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


Canon has just filed a new patent for EF 300mm F2.8L IS USM lens. Compared to the current EF 300mm f/2.8L IS USM II lens, this new telephoto prime lens will be lighter and smaller.

Detail translated by Google:

  • Patent Publication No. 2016-173439
    • Published 2016.9.29
    • Filing date 2015.3.17
  • Example
    • 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

Source: EGAMI

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