Sigma

Sigma 870956 2.0x Teleconverter TC-2001 Lens

Name: Sigma 870956 2.0x Teleconverter TC-2001 Lens
Brand: Sigma
SKU: 870956

Extend Your Reach with Enhanced Telephoto CapabilityIntroducing the Sigma 2.0x Teleconverter TC-2001, designed for Sigma lenses. This teleconverter doubles the focal length of your lens while maintaining optical quality, featuring SLD glass and a dust and splash-proof design. Magnification: 2.0...

$449.00*

✓ In Stock on Amazon.com

View on Amazon

*Price sourced from Amazon.com. Last updated:Aug 28, 2026.Price and availability are subject to change — details.

Affiliate Disclosure: As an Amazon Associate, Studio Supplies earns from qualifying purchases made through links on this page, at no additional cost to you. This helps support our editorial team.

Notice a mistake? Let Us Know

Overview

Extend Your Reach with Enhanced Telephoto Capability

Introducing the Sigma 2.0x Teleconverter TC-2001, designed for Sigma lenses. This teleconverter doubles the focal length of your lens while maintaining optical quality, featuring SLD glass and a dust and splash-proof design.

Magnification: 2.0x
Glass Elements: SLD Glass
Durability: Dust and splash-proof construction

Key Features

SLD Glass

Best Glass

Dust and splash proof

Specifications

Magnification

2.0x

Glass Type

SLD Glass, Best Glass

Environmental Resistance

Dust and splash proof

Frequently Asked Questions

What is the primary function of the Sigma 2.0x Teleconverter TC-2001 Lens?

The Sigma 2.0x Teleconverter TC-2001 is designed to extend the focal length of compatible lenses by a factor of two.

What kind of glass is used in the construction of this teleconverter?

This teleconverter incorporates SLD (Special Low Dispersion) Glass and is noted for using "Best Glass" to ensure optical quality.

Is the Sigma TC-2001 resistant to environmental factors?

Yes, it features a dust and splash-proof design, offering enhanced protection for shooting in various outdoor conditions.

Will this teleconverter work with any camera lens?

Teleconverters like the Sigma TC-2001 are generally designed to work with a specific range of compatible lenses, typically from the same manufacturer.

Does using a 2.0x teleconverter affect the light-gathering capability of my lens?

Yes, using a 2.0x teleconverter typically reduces the effective aperture by two stops, meaning less light reaches the sensor.

Strengths & Trade-offs

👍 Pros

Increases the effective focal length of compatible lenses by 2.0x, allowing you to capture subjects at greater distances.
Utilizes SLD (Special Low Dispersion) Glass, which is beneficial for reducing chromatic aberrations and enhancing image clarity.
Constructed with what is described as "Best Glass," suggesting a focus on high optical performance.
Features a dust and splash-proof design, providing enhanced durability and reliability for outdoor or challenging shooting environments.
The 2.0x magnification is ideal for photographers needing significant focal length extension without carrying multiple large lenses.

👎 Cons

The 2.0x magnification typically results in a loss of two stops of light, potentially impacting low-light performance or requiring higher ISO settings.
This teleconverter requires specific compatible lenses to function, meaning it may not work with all existing camera gear.
While "Best Glass" is mentioned, detailed specifications of the optical design are not provided to fully assess its quality.
The dust and splash-proof feature, while beneficial, does not imply full waterproofing or protection from heavy immersion.
No specific mention of camera mount compatibility is made in the provided features, which is critical for a teleconverter.