New Patent: Canon EF 16-40mm F/4 USM Lens

Canon EF 16-40mm F4 USM lens patent


Canon has just filed a new patent for EF 16-40mm F/4 USM lens. This new lens may replace the current Canon EF 17-40mm f/4L USM.

Canon ef 17-40mm F4L USM lens

The current EF 17-40mm F4L USM lens

Detail translated by Google:

  • Patent Publication No. 2015-206976
    • Published 2015.11.19
    • Filing date 2014.4.23
  • Example
    • Zoom ratio 2.36
    • Focal length 16.48 24.40 38.90
    • F-number 4.12 4.12 4.12
    • Half angle (in degrees) 52.70 41.56 29.08
    • Image height 21.64
    • Overall length of the lens 177.74 162.40 159.73
    • BF 38.00 45.51 63.40

Source: EG

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