We expect to see an RF 70-200mm f/2.8L IS USM announced some time in 2019 as part of the “holy trinity” of f/2.8 zoom lenses for Canon’s EOS R system.
Here’s the first patent for such an optical formula uncovered by Canon News.
US Patent Application 20190004296
Focal length: 72.00 135.00 194.99
F-number: 2.92 2.92 2.92
Half angle of view (deg.): 16.73 9.10 6.33
Image height: 21.64 21.64 21.64
Length of the zoom lens : 172.73 227.50 242.86
BF: 14.38 26.45 39.44
Continue reading...