We just wrote about a replacement for the EF 16-35 f/2.8L II this week, and now a patent showing an upgraded optical formula has appeared.
Patent Publication No. 2014-206674
- Published 2014.10.30
- Filing date 2013.4.15
- Zoom ratio 2.06
- Focal length f = 16.49-23.74-33.94mm
- Fno. 2.91
- Half angle of view ω = 52.69-42.35-32.51 °
- BF 38.74-48.38-63.65mm
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