Canon New Patent: EF 11-24mm f/4 Wide-angle

Canon EF 11-24mm f4 Wide-angle

Canon filed a new wide-angle zoom lens patent in Japan. This lens patent is EF 11-24mm f/4. This lens could be an alternative of rumored EF 14-24mm f/2.8L lens.

See detail, translated by Google:

Description and self-interpretation of the patent literature
  • Patent Publication No. 2014-10286
    • Publication date 2014.1.20
    • Filing date 2012.6.29
  • Example 1
    • Zoom ratio 2.06
    • Focal length f = 11.30-18.00-23.30mm
    • Fno. 4.10
    • Half angle ω = 62.42-50.24-42.88mm
    • Image height Y = 21.64mm
    • 172.19-161.28-162.86mm overall length of the lens
    • BF 38.82-52.31-63.15mm

via: EG