As well as expanding their EOS R camera and RF mount lens lineups, Canon still seems to be going pretty hard on the long telephoto lenses for the EF mount. Canon News has discovered a number of US patents alluding to what appears to be the recently released 400mm f/2.8L IS III USM, which stole all of Sony’s “Lightweight” thunder, as well as new 300mm f/2.8, 500mm f/4, and 800mm f/5.6 telephoto lenses.
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