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Canon Patent For EF 85mm f/1.2L III and Several Other Primes

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Egami has discovered a new patent filed by Canon. The new patent describes lens designs for several 85mm and 50mm prime lenses.

EF 85mm f/1.2L II replacement, an updated version (85mm f/1.2L III) has been mentioned as being under development for quite some time.

This patent includes both a 85mm f/1.2 and an 85mm f/1.8 lenses as well as a 50mm f/1.4 and a 100mm f/2. Below are the details of the patent.

Canon Patent For EF 85mm f/1.2L III and Several Other Primes

 ef-85mm-f12-lens-patent

  • Patent Publication No. 2014-52412 
    • Publication date 2014.3.20
    • Filing date 2012.9.5
  • Example
    Example Focal length Fno. Length BF
    One 85.00 1.24 125.55 38.98
    Two 85.00 1.80 113.57 39.50
    Three 51.70 1.41 88.04 39.00
    Four 100.00 2.00 120.00 39.60

    Image height = 21.64mm

via EG