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Black cylindrical teleconverter with Canon EF mount, compact metal body

SIGMA

SIGMA 1.4x Teleconverter TC-1401 for Canon EF camera lens

SKU CH-19D6-0PZA8

A 1.4× teleconverter for Canon EF lenses that extends focal length by 40 % while retaining autofocus to f/8, weighing 190 g and built with seven elements in five groups including one low-dispersion

  • TypeWide Lens
  • ColorBlack
  • CompatibilityCanon EOS
  • Camera MountCanon EF
  • Extends focal length 1.4× with Canon EF lenses
  • Seven-element optical design includes low-dispersion glass
  • Dust- and splash-resistant construction for tough conditions
  • Autofocus functions up to f/8 aperture
  • Lightweight 190 g body made in Japan

1.4x Teleconverter for Canon EF Mount

The Sigma TC-1401 is a 1.4x teleconverter designed for Canon EF mount lenses. It increases focal length by a factor of 1.4 while maintaining autofocus capability up to f/8. The optical construction uses 7 elements in 5 groups including one low dispersion element to control chromatic aberration. Weighing 190 g, it is a compact accessory made in Japan.

Ideal for telephoto extension on compatible glass

This converter suits photographers who own compatible Canon EF lenses and need extra reach without buying a longer lens. It is not for users whose lenses fall outside the supported compatibility list or who require a 2x or greater magnification factor. Buyers needing full autofocus speed at apertures smaller than f/8 should look at other solutions.

Verify lens compatibility and mount diameter

Before ordering, confirm that your specific Canon EF lens is listed as compatible with the TC-1401 by the manufacturer. Check that the lens mount diameter matches the 68.5 mm specification noted for this converter. Ensure your camera body supports autofocus at f/8 to benefit from the retained AF function.

Highlights

  • Extends focal length 1.4× with Canon EF lenses
  • Seven-element optical design includes low-dispersion glass
  • Dust- and splash-resistant construction for tough conditions
  • Autofocus functions up to f/8 aperture
  • Lightweight 190 g body made in Japan

Specifications

BrandSIGMA
Model879101
TypeWide Lens
ColorBlack
CompatibilityCanon EOS
Camera MountCanon EF

Questions about this item

Which Canon EF-mount lenses with a 68.5 mm rear mount diameter can I attach this 1.4x teleconverter to?

The TC-1401 connects to Canon EF lenses that present a 68.5 mm mount interface; it adds a 1.4x focal-length multiplier while retaining autofocus up to f/8.

Will my older Canon EOS body still autofocus when the effective aperture drops to f/8 with this converter?

Yes, the teleconverter is designed to pass AF signals so compatible EOS bodies can autofocus at the resulting f/8 aperture.

How can I verify the converter is communicating correctly after mounting it between lens and camera?

Confirm the camera displays the multiplied focal length and that autofocus acquires focus at the reported f/8 aperture.

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