A patent showing another optical formula for a diffractive optics lens has appeared, this time in the form of a 70-200mm f/2.8 DO. Most of the patent seems to talk about this lens for video applications.
Patent Publication No. 2016-80877
- Published 2016.5.16
- Filing date 2014.10.17
- 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
We expect to see new Cinema EOS announcements for IBC in September, including the Cinema EOS C700.