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Another patent for 28-560mm lens

Lens-patentCanon filed another new lens patent for the EF 28-560mm f/2.8-5.6L USM lens (First one is here) , but unlike the previous lens patent this new lens will have different optical formula that features aperture range of 2.8 to 5.6. This will be 20X optical formula super zoom lens and is designed for full frame DSLRs camera.

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

 

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