Canon filed another new patents in Japan for the upcoming rumored EF 24-70mm f/2.8L IS USM lens. There is already a patent for this lens last year.
Description and self-interpretation of the patent literature
- Patent Publication No. 2014-52413,2014-52445
- Publication date 2014.3.20
- Filing date 2012.9.5
- Example 1
- Zoom ratio 2.75
- Focal length f = 24.7-35.21-68mm
- Fno. 2.9
- Half angle ω = 41.21-31.57-17.65 °
- Image height 21.64mm
- 223.94-207.87-180.56mm overall length of the lens
- BF 38.31mm
via: EG
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