Sigma TC-2001 2.0x Teleconverter (Nikon)
The TC-2001 2x Teleconverter from Sigma will offer an increase in focal length of 2 times for select Global Vision lenses. This model offers full communication between the lens and camera and will allow autofocus to operate at up to f/8. The teleconverter also features two Special Low Dispersion elements for reducing the appearance of chromatic aberrations and maintaining quality. Additionally, for protection, the TC-2001 is both dust and splashproof. When attached, the 2x conversion results in a light loss of approximately two stops. Sigma TC-2001 For Nikon F Specs Mount Nikon F Magnification 2x Optical Design 10 Elements in 5 Groups Light Loss 2 Stop Length 1.9" / 48.9 mm Diameter 2.7" / 68.5 mm Weight 10.2 oz / 290 g