Not to be confused with the 50-150mm F/2.8 Lens APO DC HSM lens this was Sigma's top of the line telephoto zoom lens for APS-C cameras before the introduction of the "Art" series.
Feature 2 levels of optical stabilization and excellent optics this lens internally focuses and zooms making it great for video work as well.
The body is in very good condition with some signs of wear, optics are excellent, especially for a lens of this age.
Comes with original box, padded carrying case, lens hood and strap for case.
Benchmarks and reviews of this lens.
https://www.dxomark.com/sigma-50-150mm-f-2-8-ex-dc-apo-os-hsm-for-canon-and-nikon-review-a-high-performance-70-200mm-equivalent-for-aps-c-cameras/
https://www.ephotozine.com/article/sigma-50-150mm-f-2-8-ex-dc-apo-os-hsm-review-23767