The Sigma 1.4x TC-1401 teleconverter is suitable for professional use since its durable construction is dust and splash-proof. It is compact and light, and provides easy extension of focal range.
Incorporating SLD glass elements for better image quality
TC-1401 incorporates 1 SLD (Special Low Dispersion) glass element. By minimising chromatic aberration effectively, it has achieved very good optical performance, thus it is possible to maintain the optical quality of the original lens.
Compatible with lenses of large diameter
Its power distribution is designed for lenses of large diameter. Without affecting the lens performance, it offers stable image quality right up to the corners. The rich peripheral brightness enables shooting quality images at every focal length.
The durable dust and splash-proof construction is suitable for professional use
It is dust and splash-proof, and designed for higher durability.
AF is effective up to F8
When the new SIGMA TELE CONVERTER is attached to cameras that are compatible with AF at F8, it is possible to shoot with AF.
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23 September 2014
It's hard not to be impressed by Sigma's Global Vision range. So far, every single lens released has met with high praise. It really is hard to compare on a before/after basis and quality (build and optically) has gone through the ...Read full article
Please attach the TELE CONVERTER to the master lens first then attach the combined TELE CONVERTER and lens to the camera body. Attaching to SIGMA TELE CONVERTER to the camera body first may cause a malfunction and accurate operation is not guaranteed.
Using the SIGMA TELE CONVERTER decreases the effective aperture by one F-stop.
Some lenses can be used with auto focus but accurate operation is not guaranteed. For more information, there is a helpful article, HERE.