Official Canon Lens Hood ET-83G(WIII) for 77mm / RF70-200mm F2.8 F4 L IS USM
ET-83G(WIII) 77mm. Compatible lens:RF70-200mm F2.8 F4 L IS USM. Official Canon Lens Hood. This lens hood blocks unnecessary light from outside the field of view and prevents flare and ghosting that can cause image degradation.