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Canon patent for 11mm F4L USM lens


This could be a very cool lens, if the optical formula described in this Canon patent will ever go into production. Canon filed a patent for a 11mm F4L USM lens. The optical formula appears to refer to a relatively small lens with good control of optical distortions.

  • Patent Publication No. 2016-81005
    • Published 2016.5.16
    • Filing date 2014.10.22
  • Example
    • Focal length 11.33 11.47
    • F-number 4.11 4.12
    • Half angle of 62.36 62.08
    • Image height 21.64 21.64
    • Overall length of the lens 109.13 109.12
    • BF 38.90 38.40
  • [0003]However, even in the little lens distortion, by the emphasis of perspective, it may appear to be distorted photographic image. Furthermore, suitable amount of distortion varies depending on the subject and the composition to be photographed. For this reason, it is required that the distortion in the variable.
  • Canon patent
    • It is less distortion in the normal state
    • A large distortion in the distortion change state
[via Egami]
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