The Sigma 2.0x TC-2001 teleconverter has been developed exclusively for Sigma's Global Vision lenses, such as the Art, Sports and Contemporary range. By mounting it in between a telephoto lens and a camera, the offered magnification of focal length is 2x. The Special Low Dispersion glass elements offer aberration correction, while the dust-proof and splash-proof construction increases its longevity. The TC-2001offers full communication between the lens and camera and will support autofocus at F8.