Fotodiox Dedicated Bayonet Lens Hood (ET-63)&nbsp;- for Canon EF-S 55-250mm f/4-5.6 is STM Lens Dedicated lens hood for Canon EF-S 55-250mm f/4-5.6 IS STM 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