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Canon patent for 28-200mm f/3.5-5.6 lens

canon patent

Canon patent for a 28-200mm f/3.5-5.6 lens. Not sure where to put this optical formula. Looks like a budget super-zoom.

  • Patent Publication No. 2015-172612
    • Published 2015.10.1
    • Filing date 2014.3.11
  • Example 1
    • 1
    • Zoom ratio 6.68
    • Focal length 28.90 51.17 193.10
    • F-number 3.63 4.39 5.88
    • Half angle (in degrees) 36.82 22.92 6.39
    • Image height 21.64 21.64 21.64
    • Overall length of the lens 132.70 149.90 182.70
    • BF 39.40 49.73 66.13,
[via Egami]
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