Canon has just filed a new patent for EF 70-200mm f/2.8 DO (Diffractive Optics) lens. This is the third 70-200mm F2.8 lens after the current EF 70-200mm F2.8L II and is rumored to be announced before 2020.
Detail translated by Google:
- Patent Publication No. 2016-80877
- Published 2016.5.16
- Filing date 2014.10.17
- Example
- Focal length 72.15 134.00 193.98
- Zoom ratio 2.69
- F-number 2.91 2.91 2.91
- Half angle of 16.69 9.17 6.36
- Image height 21.64
- Overall length of the lens 223.50 223.50 223.50
- BF 45.35 45.35 45.35
Source: EGAMI
Read More Canon Lens Patent