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 minor cosmetic surface wear, minor internal dust, one small front element coating mark which does not affect imaging. Includes lens hood and case.