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