Protect your valuable 10-20mm F3.5 EX DC HSM Lens and get the most out of your photography with this Sigma Lens Hood.With its specially designed shape and ridged interior, you can be sure that no unwanted lights will ruin your photos. The petal-shaped hood features a ridged interior surface that blocks unwanted light from reaching your lens and creating unwanted flare. Plus, it offers extra protection from accidental impact and the elements because of its sturdy construction. Get ready to take your photos to a whole new level without dealing with unwanted flares!