Tag: Canon EF 500mm f/4 Lens

Canon Patents: EF 800mm f/5.6, 600mm f/4, 500mm f/4, 400mm f/2.8 Lenses

Canon has filed three new patents for EF 800mm f/5.6, 600mm f/4, 500mm f/4, 400mm f/2.8 Lenses, which are designed

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