Sigma TC-2001 2x Teleconverter for Canon EF

Extend the focal length of your Canon EF-mount lens with the Sigma TC-2001 2× Teleconverter. The teleconverter offers full electronic communication between the camera and lens for an autofocus of up to f/8. Two Special Low Dispersion elements are incorporated into the teleconverter to combat chromatic aberrations. This Sigma teleconverter restricts light loss up to two stops. And, the dust and splashproof design allows using the teleconverter in inclement weather.