This fast mid-range zoom for Sony E-mount cameras has specialized glass elements that control aberrations and deliver excellent resolution throughout the entire focal length range. All the lens surface is treated with Tamron’s proprietary BBAR (Broad-Band Anti-Reflection) Coating that significantly reduces ghosting and flare. An all-new high-speed AF drive system with an RXD stepping drive delivers rapid, quiet focusing action. The lens features close focusing of 0.19 meters at the wide setting as well as moisture-resistant coating construction and fluorine coating, making it ideal for outdoor and nature photography. Weighing just 550g and being 117.8mm in length, it is a highly portable lens for every photographic adventure.