Sigma Hood for 150-600mm f/5-6.3 DG OS HSM Contemporary Lens Sigma Hood for 150-600mm f/5-6.3 DG OS HSM Contemporary Lens - Sigma 4 Year Limited Warranty (1 Year North and South America + 3 Year USA Extended Warranty Upon Registration) Compatibility: 150-600mm f/5-6.3 DG OS HSM Contemporary Lens