- Description
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Details
Optimized for Canon EF-mount lenses in the Global Vision line, the Sigma 1.4 X Teleconverter TC-1401 (only for SGV Lenses), Mount for Sigma from Sigma will offer an increase in focal length of 1.4 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 one Special Low Dispersion element for reducing the appearance of chromatic aberrations and maintaining quality. Additionally, for protection, the TC-1401 is both dust and splashproof. When attached, the 1.4x conversion results in a slight loss of approximately one stop. 
Sigma 1.4 X Teleconverter TC-1401 (only for SGV Lenses), Mount for Sigma Features
1. Incorporating SLD glass elements for better image quality
TC-1401 incorporates 1 SLD (Special Low Dispersion) glass element, and TC-2001 carries 2. By minimizing chromatic aberration effectively, it has achieved very good optical performance, thus it is possible to maintain the optical quality of the original lens.
2. 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 until corners. The rich peripheral brightness enables shooting quality images at every focal length.
3. The durable dust and splash-proof construction is suitable for professional use
It is dust and splash-proof and designed for higher durability. SIGMA 150-600mm F5-6.3 GD OS HSM |Sports and other telephoto lenses are able to meet the demands that professional photographers would require in severe shooting conditions, such as in the rain.
4. 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.
5. Evaluation with SIGMA's own MTF measuring system "A1"
We used to measure lens performance with an MTF measuring system using conventional sensors. However, we’ve now developed our own proprietary MTF (modulation transfer function) measuring system (A1) using 46-megapixel Foveon direct image sensors. Even previously undetectable high-frequency details are now within the scope of our quality control inspections. The SIGMA TELE CONVERTER TC-1401 and TC-2001 will all be checked using this “A1” before they are shipped.
Specifications
Brand Sigma Manufacture SKU 879110 UPC 085126879563 Mount Sigma SA Magnification 1.4x Optical Design 7 Elements in 5 Groups Light Loss 1 Stop Length 1" / 25 mm Diameter 2.7" / 68.5 mm Weight 6.7 oz / 190 g
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