Sigma Corporation Releases Tele Converters TC-1401 and TC-2001 on Oct.24, 2014: SIGMA 120-300mm F2.8 DG OS HSM | Sports Lens Needs Firmware Update to Be Compatible 2014-10-10
Gentec Announces Availability of Sigma 1.4x (TC-1401) and 2x (TC-2001) Teleconverters in Canada 2014-09-15
