Sigma APO DG OS 150-500mm F5-6.3 telephoto lens, with optical stabilizer for Canon DSLR cameras. New condition, includes a protective UV filter for the objective lens ($130 new). Originally purchased new in Dec. 2014; one owner. Sigma does not sell a 150-500 lens currently, the closest new lens to this one is a 150-600mm F5-6.3. According to their Canadian website, it retails for $1499.