ProOptic Dedicated Lens Hood for Canon EF 70-300mm f/4-5.6 IS USM & EF 70-300mm f/4-5.6 IS-DO USM Lenses (ET-65B) ProOptic Dedicated Lens Hood for Canon EF 70-300mm f/4-5.6 IS USM &amp; EF 70-300mm f/4-5.6 IS-DO USM Lenses (ET-65B)