Sigma 879954 1.4X Teleconverter TC-1401 CA (Used)

The Sigma 1.4X TC-1401 Teleconverter for Canon EF mount is a practical optical accessory that extends the focal length of compatible lenses by a factor of 1.4x. This makes it an appealing option for wildlife, sports, and event photographers who want additional reach without investing in a heavier, more expensive super-telephoto lens. The 1.4x multiplication factor strikes a balance between added magnification and preserved image quality, introducing far less optical degradation than a 2x converter typically would.

This particular unit is sold in used condition, making it an accessible entry point for photographers looking to experiment with teleconverters. The TC-1401 is designed to work seamlessly with select Sigma and Canon EF lenses, maintaining electronic communication for autofocus and metering. Users should be aware of the one-stop aperture loss inherent to any 1.4x converter, and should confirm that their specific lens is on Sigma's compatibility list for best results.