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The diffractive optics related patents continue to appear from Canon. This time we get a patent that covers both a 300mm f/2.8 DO and a 400mm f/2.8 DO. We think a slew of diffractive optics super telephotos are on the way for the RF mount and these two optical formulas may find their way to the RF mount in 2020. Perhaps alongside an EOS R version of the EOS-1D X Mark II.
Japan Patent Application 2018-189878 Focal distance: 392.58 Focal distance: 293.40 Photography via Canon Rumors https://ift.tt/2v4dYqS November 29, 2018 at 12:36PM
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