New Patent: Canon EF 28-560mm f/2.8-5.6L USM Lens

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The Current Canon EF 28-300 f/3.5-5.6L IS USM Lens

Canon patented a EF 28-560mm f/2.8-5.6 lens on May 20, 2016 (Check here). Today Canon filed a new patent for the EF 28-560mm f/2.8-5.6L USM lens, but this lens has different optical formula. This is a 20x optical formula super zoom lens designed for Canon full frame DSLRs and it is expected to be the successor to the current EF 28-300 f/3.5-5.6L IS lens.

Take a look at the patent details below translated by Google.

Patent Publication No. 2016-142795

  • Published 2016.8.8
  • Filing date 2015.1.30

Example 1

  • Zoom ratio 18.86
  • Focal length 28.80 119.57 543.20
  • F-number 2.88 4.56 5.88
  • Half angle of view (degrees) 36.91 10.26 2.28
  • Image height 21.64 21.64 21.64
  • The total lens length 281.07 331.07 385.01
  • BF 53.05 61.31 40.00
  • The effective diameter of the front lens 120.00

via: Egami

Read more: Canon Patents