Sigma Lens Hood for 150-500mm F5-6.3 G OS HSM Lens Sigma Lens Hood - Sigma 1 Year North and South America Limited Warranty (3 Year USA Extended Warranty for a Total of 4 Years from Date of Purchase) Sigma Lens Hood for 150-500mm F5-6.3 G OS HSM and 180/2.8 APO MACRO EX DG OS HSM Lens