Sigma DG 150-500mm f5-6.3 APO HSM OS for Nikon FThe Sigma DG 150 500mm f5 6. 3 APO HSM OS is a long lens with a long name. This is a long range supertelephoto zoom lens with pretty solid optical performance. The optical image stabilizer helps keep things steady, and a large grip tripod foot makes for easy handling. In excellent condition overall, with one notable cosmetic paint scratch on the barrel visible on the right of the image, in line with the "Sigma DG" branding. Includes lens hood and case.