Canon Japan has just filed a new lens patent on EF 70-200mm f/2.8 DO (Diffractive Optics) lens. It is suggested that this lens will be announced before 2020.
- Patent Publication No. 2016-80877
- Published 2016.5.16
- Filing date 2014.10.17
- Example 1
- Zoom ratio 2.69
- Focal length 72.15 134.00 193.98
- F-number 2.91 2.91 2.91
- Angle of view 16.69 9.17 6.36
- Image height 21.64
- The total lens length 223.50 223.50 223.50
- BF 45.35 45.35 45.35
via: EG
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