The Sigma 100-400mm 5-6.3 DG HSM OS Contemporary is a state-of-the-art telephoto zoom that brings a new level of portability and quality to the super telephoto market. Touting Sigma's Optical Stabilizer (OS), the Sigma 100-400mm 5-6.3 Contemporary is highly compact and lightweight compared to similar products on the market. A push/pull zooming function and a new Hyper Sonic Motor (HSM) allow for a more responsive approach to photography while a 1:3.8 macro feature can be utilized from up close or from a further distance. Like each and every Global Vision Lens, the Sigma 100-400mm Contemporary Art is handcrafted at our single factory in Aizu, Japan and undergoes individual evaluation before leaving Sigma's facility.