The Sigma APO Teleconverter 1.4x EX DG for EF Mount is used to extend the reach of your telephoto lens. The Sigma APO Teleconverter 1.4x EX DG for EF Mount increases the focal length of your lens by about 40% and only loses 1 stop of light in the process. The Sigma APO Teleconverter 1.4x EX DG for EF Mount also retains communication between the lens and the camera, which allows the photographer to use automatic metering and autofocus. The teleconverter also features a multi-layer coating that reduces flare and ghosting for sharp, clear imagery.
WARNING: This product may expose you to chemicals which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov