Canon EF Mount. We carry this teleconverter in multiple mounts with this one being the Canon version.

Compatible with Global Vision Lenses. At this time, the TC-2001 is only compatible with the Sigma 120-300mm f/2.8 DG OS HSM A1, Sigma 150-600mm f/5-6.3 DG OS HSM Sports A1, Sigma 150-600mm f/5-6.3 DG OS HSM C A1, and Sigma 500mm f/4 DG OS HSM Sports.

2x Magnification. When mounted to a compatible lens, this teleconverter increases the focal length by 2×. Do note that this causes approximately two stops of light loss.

High-Quality Optics. The five-group/ten-element optical formula includes two SLD (Special Low Dispersion) elements to help eliminate chromatic aberrations and produce high-quality images with minimal degradation.

Dust- and Splash-Proof. Allows you to keep shooting when conditions get iffy, provided your camera and lens are also weather-sealed.

Please Note: We carry this teleconverter in multiple mounts. This is the Canon version.