Sigma TC-2001 2x Teleconverter Mount:for Canon EF which provides quick and especially

which provides quick and especially quiet focusing performance

Compatible with select Sony cameras featuring Bluetooth connectivity

but can also be used to control exposure compensation settings

converters

Tool-Free Camera AttachmentForget fumbling for tools—this plate features a folding thumbscrew for quick

Sigma TC-2001 2x Teleconverter Mount:for Canon EF which provides quick and especiallyOptimized 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.