ASC, fluorine coating. Special coatingASC, fluorine coating. Key Features of the Canon RF 100-500mm F4.5-7.1 L IS USM Lens. Canon RF 100-500mm f/4.5-7.1 L IS USM Lens. Released alongside the EOS R5, theCanon RF 100-500mm F4.5-7.1 L IS USM Lens is set to impress with a range targeted at sports photography and the keen wildlife photographer.
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