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Another patent showing a Canon EF 24-70 f/2.8L IS. We have seem them in the past and have been told that prototypes have existed for such a lens. The issue has always been size and weight and it being usable over long periods of time for event photographers.
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
Source: [EG]
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