This short lens hood is smaller than the hood thats included with the EF 400mm f/2.8L IS III USM for easier handling and transportation. It prevents stray light from entering the lens which can be a source of flare and ghosting whilst providing a degree of protection for the lens front element. Its built to the same exacting standards as the EF 400mm f/2.8L IS III USM lens, designed to blend in perfectly with its thermally-insulating white paint exterior.BenefitsPrevents flare and ghosting when shooting into the lightShorter design is easier to handle, transport and storeProtects the lens front element from accidental damageDesigned specifically for the EF 400mm f/2.8L IS III USMStyled to match the white exterior of Canons super-telephoto lensesLightweight so wont add weight to your lensCan be reversed and attached to the lens to save spaceThis short lens hood is smaller than the hood thats included with the EF 400mm f/2.8L IS III USM for easier handling and transportation. It preven