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Canon Patents For 55mm f/1.4 Lens And Other Primes

Canon PatentsCanon Patents

Egami (translated) spotted a patent filed by Canon for a 55mm f/1.4, a 35mm f/1.4, and other fast primes.

  • Patent Publication No. 2014-123018
    • Publication date 2014.7.3
    • Filing date 2012.12.21
  • Example
    Example Focal length Fno. Half angle The overall length of the lens BF MOD
    One 49.53 1.45 23.60 99.46 38.10 450
    Two 35.88 1.45 31.09 126.92 38.77 300
    Three 55.42 1.45 21.33 100.44 40.24 450
    Four 50.75 1.45 23.09 98.17 38.29 450

    Image height = 21.64mm

  • Canon patents
    • Positive and negative Shibomake positive
    • Inner focus
[via Egami]
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