Patents: RF 70-200mm f/4L, RF 28mm f/1.8, RF 50mm f/1.8

There should be more affordable and non-L lenses in the Canon RF lens roadmap. USPTO has new patents for Canon RF 70-200mm f/4L Lens, RF 28mm f/1.8 Lens, and RF 50mm f/1.8 Lens.

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