By stopping unwanted light from shining directly into the lens, the ET-74B Lens Hood helps to preserve image quality by reducing flare and ghosting. It also serves as protection for the lens front element.BenefitsA high-quality lens hood designed specifically for the EF 70-300mm f/4-5.6 IS II USM lensCan also be fitted to the lens backwards to save space in your bagProtects the front of the lens from accidental damagePreserves image quality when shooting into the sunBy stopping unwanted light from shining directly into the lens, the ET-74B Lens Hood helps to preserve image quality by reducing flare and ghosting. It also serves as protection for the lens front element.BenefitsA high-quality lens hood designed specifically for the EF 70-300mm f/4-5.6 IS II USM lensCan also be fitted to the lens backwards to save space in your bagProtects the front of the lens from accidental damagePreserves image quality when shooting into the sun