The Sigma TC-2001 2x Teleconverter for Nikon is a a teleconverter designed specifically for use with Sigma’s Global Vision line of compatible lenses. Key features include:
Limited compatibility
2x magnification
High-quality optics
Dust- and splash-proof
Nikon F Mount: We carry this teleconverter in multiple mounts with this one being the Nikon 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, Sigma 150-600mm f/5-6.3 DG OS HSM Contemporary, 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 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.