Canon Patents EF 28-560mm f/2.8-5.6 Optical Design

According to the Egami Blog, Canon has patented the optical design for an EF 28-560mm f/2.8-5.6.
 
With full-frame coverage, a huge focal range and an f/5.6 maximum aperture at the lens’s longest extent, this would be a very enticing lens for many wildlife and sports photographers.
 
Patent Description
 

  • Patent Publication No. 2016-80973
  • Published 2016.5.16
  • Submitted 2014.10.21
  • Zoom ratio 18.78
  • Focus distance 28.80 139.49 540.91
  • F-number 2.88 4.77 5.88
  • Angle of View (degrees) 36.91 8.82 2.29
  • Length 298.13 341.13 398.13
  • BF 44.99 76.94 116.58

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