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Canon 20-45mm F2.8-4.0 Lens Patent

Canon 20-45mm lens patent image

A new Canon patent surfaced over the web that shows Canon is working on 20-45mm Fullframe lens with F2.8-4.0 aperture.

Take a look at the patent details below. (translated by google)

  • Patent Publication No. 2015-197593
    • Published 2015.11.9
    • Filing date 2014.4.1
  • Example
    • Zoom ratio 2.25
    • Focal length f = 20.00 23.60 45.00
    • Fno. 2.75 2.90 4.16
    • Half angle of 47.25 42.51 25.68
    • Image height 21.64 21.64 21.64
    • Overall length 158.28 156.32 173.36
    • BF 42.05 46.10 73.14

See more Canon Patent


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