The Sigma 150-600mm f/5-6.3 DG OS Contemporary Lens for Sigma combines the concept of maximum portability with optimum image quality to create one of the best variable aperture, hyper-telephoto, zoom lenses. This lightweight and compact zoom lens can handle any long-reach photographic situation you may encounter. It boasts of an updated hypersonic motor and a new optical stabilizer. It also includes an accelerometer for improved panning photography. The lens has a new zoom lock switch that can be locked at any focal length with a manual override for improved focusing control. It works with any Sigma USB dock, allowing for maximum customization such as firmware updates and focus adjustments.