e of the most important accessories for each lens you own A lens hood provides multiple functions: it shades the lens from stray light, improving your contrast and image quality; in inclement weather, it can assist in keeping moisture or wind-blown debris off the lens; and it protects the front barrel from the inevitable impacts against walls, door frames, and other real-life obstacles This hood is designed for the Canon 70 to 300mm f4.5-5.6 DO-IS and f/4-5.6 IS.

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