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Sigma 826969 2.0x Teleconverter TC-2011 L-Mount — main product image
Sigma 826969 2.0x Teleconverter TC-2011 L-Mount
Sigma 826969 2.0x Teleconverter TC-2011 L-Mount
Sigma 826969 2.0x Teleconverter TC-2011 L-Mount
Sigma 826969 2.0x Teleconverter TC-2011 L-Mount
Sigma 826969 2.0x Teleconverter TC-2011 L-Mount
Sigma 826969 2.0x Teleconverter TC-2011 L-Mount
Sigma

Sigma 826969 2.0x Teleconverter TC-2011 L-Mount

★★★★★4.3 (16 reviews)

Double your focal length on compatible L-Mount lenses while preserving autofocus, metering, and image stabilization.

$479.00*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Sigma 2.0x Teleconverter TC-2011 is designed for L-Mount photographers who need to extend their focal length reach significantly. By doubling the focal length of any compatible Sigma L-Mount lens, it transforms a 100–400mm zoom into a 200–800mm, for example, making it a valuable tool for wildlife, sports, and aviation photography. Critically, the TC-2011 maintains full electronic communication with the host lens, preserving autofocus, metering, and optical image stabilization so that the shooting experience remains largely consistent with using the lens alone.

The trade-off for that 2.0x magnification is a two-stop reduction in maximum aperture and some inevitable optical softening compared to shooting with the base lens on its own. Autofocus may also slow down, particularly in dim conditions where the reduced effective aperture limits the light reaching the AF sensor. The TC-2011 is compact and adds minimal weight to your kit, making it a far more portable alternative to carrying a dedicated longer telephoto. For photographers already invested in compatible Sigma L-Mount glass, it offers a meaningful way to extend reach while keeping their bag manageable.

Key Features

2.0 Teleconverter TC-2011

Specifications

Magnification
2.0x
Mount
L-Mount
Compatibility
Select Sigma L-Mount Lenses
Autofocus
Maintained
Metering
Maintained
Image Stabilization
Maintained
Model Number
826969

Pros & Cons

👍 Pros

  • Doubles the focal length of compatible lenses, significantly extending reach without carrying a second lens
  • Maintains autofocus, metering, and image stabilization for a seamless shooting experience
  • Compact and lightweight compared to carrying a dedicated longer telephoto lens
  • L-Mount native design ensures proper electronic communication with compatible Sigma lenses

👎 Cons

  • Reduces the effective maximum aperture by two full stops, limiting low-light performance
  • Compatible with only a limited selection of Sigma L-Mount lenses
  • A 2.0x magnification introduces more optical degradation than a 1.4x teleconverter
  • Autofocus speed may slow noticeably, especially in low light or with subjects at distance

Frequently Asked Questions

The TC-2011 is compatible with select Sigma L-Mount lenses specifically designed to work with this teleconverter. Check Sigma's compatibility list for supported models.
A 2.0x teleconverter reduces the maximum aperture by two stops. For example, an f/2.8 lens becomes an effective f/5.6.
Yes, it maintains autofocus, metering, and image stabilization when used with compatible lenses, though autofocus speed may be reduced.
No, it only works with select compatible L-Mount lenses. Not all L-Mount lenses support teleconverter attachment.
Any teleconverter introduces some optical compromise. The TC-2011 is designed to minimize this, but doubling focal length with a 2.0x converter will have more impact than a 1.4x converter.

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