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Canon patent for new Cine lenses (CN-E 18-85mm f/2.8)

canon patent

CN-E 18-85mm f/2.8

Another Canon patent. This time we have a patent for a new Cine lens, CN-E 18-85mm f/2.8. The patent for the 18-85mm seems to share the same optical formula as the already released CN-E 15.5-47mm f/2.8 lens.

  • Patent Publication No. 2015-4917
    • Published 2015.1.8
    • Filing date 2013.6.24
  • Example 1
    • Zoom ratio 2.80
    • Focal length 16.00 29.68 44.80
    • F number 2.80
    • Half angle (in degrees) 43.15 26.81 18.51
    • Image height 15.00
    • Overall length of the lens 263.54
    • BF 39.04
  • Example 2
    • Zoom ratio 4.50
    • Focal length 18.50 45.61 83.25
    • F number 2.80
    • Half angle (in degrees) 39.04 18.20 10.21
    • Image height 15.00
    • Lens length 263.78 263.78 263.78
    • BF 46.93 46.93 46.93
  • Canon patents
    • 5-group zoom of positive and negative negative-positive-positive
    • Inner focus (part of the first group)
    • Inner zoom
CN-E 15.5-47mm f/2.8

CN-E 15.5-47mm f/2.8

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