We posted a couple of days ago that Canon was well into the development of new “big white” lenses. The first patent for a new optical formula has appeared for an EF 300mm f/2.8L IS.
Patent Publication No. 2016-173439 (Google Translated)
- Published 2016.9.29
- Filing date 2015.3.17
- Focal length 292.46
- F-number 2.91
- Angle of view 4.23
- Image height 21.64
- Overall length of the lens 273.95
- BF 60.81
We don’t expect to see the supertelephoto lenses updated until at least 2018.