The Sigma TC-1401 is a high standard 1.4x tele-converter that is designed specifically for Sigma's Global Vision product lines. By mounting it in between a telephoto lens and a camera, the offered magnification of focal length is increased by 1.4 times. The Tele Converter incorporate SLD (Special Low Dispersion) glass elements that offer excellent aberration correction. It is unusual for a lens accessory to use one of the best glass materials, yet this is because Sigma is seeking for the best possible image quality, and it is necessary to meet the "SGV" standards. The dust and splash proof construction ensure this tele-converter is suitable for professional. It is compact and lightweight and provides an easy extension of focal range.
The TC-1401 incorporates 1 SLD (Special Low Dispersion) glass element. By minimising chromatic aberration effectively, it has achieved excellent optical performance, thus it is possible to maintain the optical quality of the original lens.
Its power distribution is designed for lenses of a large diameter. Without affecting the lens performance, it offers stable image quality even to the corners. The rich peripheral brightness enables shooting quality images at every focal length. When the TC-1401 is attached to cameras that are compatible with AF at F8, it is possible to shoot with AF.
The TC-1401 is dust and splash-proof and designed for higher durability. The SIGMA 150-600mm F5-6.3 DG 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. A rubber part is attached to where it mounts with the original lens, and it prevents the devices from scratching each other. It has the same materials and finishing for integrated design as the lenses from the new product lines.
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 will all be checked using this "A1" before they are shipped. All Sigma's manufacturing - right down to the moulds and parts - is carried out under an integrated production system, entirely in Japan. We are now one of the very few manufacturers whose products are solely "made in Japan". We like to think our products are somehow imbued with the essence of our homeland, blessed as it is with clean air and water, and focused, hard-working people. We pride ourselves on the authentic quality of Sigma products, born of a marriage between highly attuned expertise and intelligent, advanced technology. Our sophisticated products have satisfied professionals and lovers of photography all over the world, because our manufacturing is based on genuine craftsmanship, underpinned by the passion and pride of our experts.
TC-1401 Tele Converter