A new Canon patent application for RF mount lenses with "Defocus Smoothing" (DS) optical technology.…
Another Canon Patent For A 24-70mm f/2.8 Image-Stabilized Lens
Egami (translated) spotted a Canon patent for a 24-70mm f/2.8 IS lens. This is the fourth time I am posting about such a patent (the other patents: 1 | 2 | 3).
- 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