Sigma TC-2011 2x Teleconverter for L-mount Mount:for Nikon F Two aspherical elements and one

Two aspherical elements and one high-refractive index element are used to limit distortion and spherical aberrations and also contribute to greater overall sharpness and accurate rendering

and vivid image playback and live view shooting

is also featured and

more precise focusing

photographer and author John Greengo covers light

Sigma TC-2011 2x Teleconverter for L-mount Mount:for Nikon F Two aspherical elements and oneOptimized for Canon EF mount lenses in the Global Vision line, 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 allows 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.