Sigma Tele Converter TC-2001, 2x Magnification, Nikon F-Mount, AF Support, Dust & Splashproof

The SIGMA TELE CONVERTER TC-2001, Nikon F mount, doubles the effective focal length of compatible telephoto lenses, letting you reach distant subjects without buying a longer lens. With a compact, lightweight body and two SLD glass elements, it preserves optical performance while adding approximately two stops of light loss, making it ideal for wildlife, birding, and sports where extra reach is essential.

The converter is dust and splash proof, and retains electronic aperture and AF communication with supported lenses and camera bodies, meaning exposure data and stabilization continue to work. Designed for SIGMA Global Vision telephoto optics and manufactured in Japan, the TC-2001 delivers practical reach extension with predictable results in the field.

Problem

Photographers often face two choices when needing extra reach, buy a new super-telephoto lens, or use a teleconverter. New lenses are expensive and heavy, while some extenders severely degrade image quality, or lose AF functionality. The TC-2001 addresses these problems by offering a purpose-built 2,0× option that balances reach and optical integrity.

• Cost and weight of purchasing an additional long lens.
• Loss of sharpness and chromatic aberration with lesser extenders.
• Uncertain AF operation with some camera and lens combinations.

Extended Reach, Practical Size

The TC-2001 increases focal length by two times while remaining a compact accessory, approximately 69.8 mm in diameter and 48.9 mm long, weighing about 290 g. That compact footprint means you can carry extended reach in a jacket pocket, or add the converter to an existing telephoto set without a large increase in bulk. On safari, birding trips, or at sporting events, that small size translates to less fatigue, and more time shooting at long ranges. The converter's metal mount and internal construction provide mechanical rigidity, so attached lenses retain stable alignment and predictable performance. Use the TC-2001 with SIGMA Global Vision telephoto primes and zooms specified as compatible to preserve edge performance, and expect reliable electronic communication so that EXIF data and aperture control remain intact. Because the optical design incorporates two SLD elements, longitudinal and lateral chromatic aberration are controlled, which helps maintain subject detail even when cropping is required for final composition. The TC-2001 is not a substitute for every long lens, but it is a highly practical way to double focal length when weight, budget, or logistics make a new super-telephoto impractical.

The converter's dust and splash proof construction gives peace of mind when shooting in challenging environments, from dusty plains to light rain. The rubberized mount interface prevents metal-to-metal contact between lens and converter, protecting finishes and maintaining tight tolerances at the mount, which is essential for consistent AF performance. In practical shooting, expect roughly two stops of light loss, which affects exposure and low-light autofocus, so plan ISO and shutter accordingly. When paired with lenses specified by SIGMA as compatible, the TC-2001 keeps peripheral brightness and image quality optimized across the frame, letting you make meaningful reach gains while preserving the look of your primary optics. The unit is manufactured in Japan under SIGMA's integrated production system, assuring consistent build quality for demanding field use.

Solution

The TC-2001 provides a cost effective, portable solution to extend your lens reach by 2.0×, preserving lens communication and delivering controlled optical performance through 2 SLD elements and a 10 element, 5 group design. Use it with SIGMA telephoto lenses listed as compatible to retain AF and stabilization where supported, and benefit from weather-sealed construction for outdoor shooting.

Benefits

• Cost Efficient Reach: Extend reach without the expense of a new super-telephoto lens.
• Preserved Image Quality: SLD elements maintain sharpness and reduce color fringing.
• Reliable in the Field: Weather sealing and robust build for outdoor work.
• Integrated Communication: EXIF, aperture, and stabilization signals retained where supported.

Applications

• Wildlife and bird photography, where extra reach matters.
• Outdoor sports and action photography at a distance.
• Astrophotography and lunar imaging that benefit from doubled focal length.

Why Choose

• Optimized for SIGMA Global Vision telephoto lenses, offering a balance of optical correction, compactness, and reliability compared to generic extenders.