New Patents: Canon RF 300mm f/2.8 DO & 400mm f/2.8 DO Lenses
Canon recently filed two new diffractive optics lens patents in Japan: 300mm f/2.8 DO & 400mm f/2.8 DO. These two new lenses are probably RF mount lenses, and are expected to come in 2020 alongside an EOS R version of the EOS-1D X Mark II. Japan Patent Application 2018-189878 Focal distance: 392.58 F number:2.91 A half field angle: 3.15 Image height: […]
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