Sigma 879954 1.4X Teleconverter TC-1401 CA (Used) — main product image

Sigma 879954 1.4X Teleconverter TC-1401 CA (Used)

Sigma

Sigma 879954 1.4X Teleconverter TC-1401 CA (Used)

Name: Sigma 879954 1.4X Teleconverter TC-1401 CA (Used)
Brand: Sigma
SKU: 879954

★★★★★4.4 (5 reviews)

Extend your Canon EF lens reach by 1.4x with Sigma's compact, high-clarity teleconverter.

$210.97*

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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 1.4X TC-1401 Teleconverter for Canon EF mount is a practical optical accessory that extends the focal length of compatible lenses by a factor of 1.4x. This makes it an appealing option for wildlife, sports, and event photographers who want additional reach without investing in a heavier, more expensive super-telephoto lens. The 1.4x multiplication factor strikes a balance between added magnification and preserved image quality, introducing far less optical degradation than a 2x converter typically would.

This particular unit is sold in used condition, making it an accessible entry point for photographers looking to experiment with teleconverters. The TC-1401 is designed to work seamlessly with select Sigma and Canon EF lenses, maintaining electronic communication for autofocus and metering. Users should be aware of the one-stop aperture loss inherent to any 1.4x converter, and should confirm that their specific lens is on Sigma's compatibility list for best results.

Specifications

Magnification

1.4x

Mount

Canon EF

Brand

Sigma

Model

TC-1401

Condition

Used

Pros & Cons

👍 Pros

Compact and lightweight design adds minimal bulk to your lens setup
High-quality Sigma optics maintain sharpness with only 1.4x magnification penalty
Direct Canon EF mount compatibility with no adapter required
Cost-effective way to gain extra reach without buying a longer lens

👎 Cons

Reduces maximum aperture by one full stop
Autofocus speed may decrease, especially in low light or with slower lenses
Sold as a used item, so cosmetic condition may vary
Not compatible with all Canon EF lenses—check Sigma's compatibility list

Frequently Asked Questions

What focal length increase does the Sigma TC-1401 provide?

It multiplies your lens's focal length by 1.4x. For example, a 200mm lens becomes an effective 280mm.

Which lens mount is this teleconverter compatible with?

This version is designed for Canon EF mount lenses. It will not work with EF-S, RF, or other mount systems without an adapter.

How does the TC-1401 affect aperture?

A 1.4x teleconverter reduces the maximum aperture by one stop. A lens with a maximum aperture of f/2.8 will effectively become f/4 with the converter attached.

Is this unit sold in new or used condition?

This listing is for a used unit. Cosmetic wear may be present, but optical and mechanical function should be intact.

Does autofocus still work with this teleconverter attached?

Autofocus is supported, though performance depends on the host lens and camera body. Lenses with a maximum aperture of f/5.6 or wider generally maintain autofocus capability.