The Sigma TC-2001 incorporates 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 image quality, and it is necessary to meet the new “SGV” standards. It 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
- Compatible with lenses of large diameter
- Durable dust and splash-proof construction is suitable for professional use
- AF is effective up to F8
- Evaluation with Sigma's own MTF measuring system “A1”
Incorporating SLD glass elements for better image quality
TC-2001 incorporates 2 SLD (Special Low Dispersion) glass element. By minimizing chromatic aberration effectively, it has achieved excellent 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 even 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. 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.
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.
* When shooting subjects with low contrast or luminosity value, focus may not be spot on the subject.
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.
Ease of use
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.