More on Amazon.com : http://www.amazon.com/gp/product/B0007NIB74?tag=thefatkidin06-20 <br /> <br />Canon ET-83C Lens Hood for EF 100-400mm f/4.5-5.6L IS USM Lens <br /> <br />Designed to prevent unwanted stray light from entering the lens <br />Ensures no problems with vignetting or motor functions <br />Added benefit of extra protection from accidental impact <br />Compatible with EF 100 to 400mm f45 to f56L IS USM lens
