Fotodiox Dedicated Bayonet Lens Hood (ET-65B)- for Canon EF 70-300mm f/4.5-5.6 DO IS USM and EF 70-300mm f/4-5.6 IS USM Lenses Dedicated lens hood for Canon EF 70-300mm f/4.5-5.6 DO IS USM and EF 70-300mm f/4-5.6 IS USM Lens Blocks stray light improves contrast also prevents lens flare and ghosting Bayonet mount will not affect mounting filters or caps protects front element of lens; Reversible for easy storage Constructed from high impact plastic for durability 24 Month Fotodiox Warranty