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Canon EF Extender 2X III Teleconverter

The Canon 2X III is a lens from Canon. Used copies start from $316.41 on GearFocus, with buyer protection on every purchase.

Canon EF Extender 2X III Teleconverter

Canon EF Extender 2X III Teleconverter

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Canon EF Extender 2X III Teleconverter

Condition: Like New

Product Highlights

  • 2x focal length extension
  • Compatible with select Canon EF lenses
  • Weather-resistant construction
  • Advanced optical elements for high image quality

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Used Canon 2X III Listings on GearFocus

Canon EF Extender 2X III Teleconverter
Canon EF Extender 2X III Teleconverter

Like New

$316.41

🚚 Free Shipping

Lens Overview — Canon 2X III

The Canon EF Extender 2X III is a teleconverter designed for use with Canon EF mount lenses. Based on the available product data, the key confirmed specification is its Canon EF lens mount compatibility, meaning it is built to work within the Canon EF ecosystem. Teleconverters of this type are used to extend the reach of existing lenses, and this unit carries the Canon EF mount designation on both its lens-side and camera-side connections.

If you are shooting with Canon EF mount glass and looking to add reach without purchasing an entirely new lens, this extender is engineered to fit directly into that system. The specifications provided confirm the Canon EF mount as the single verified compatibility point. Buyers considering this accessory should verify compatibility with their specific Canon EF lenses before purchasing, as not all EF lenses are compatible with extenders.

The Canon EF mount is one of the most widely used DSLR lens mounts, and this teleconverter is positioned squarely within that lineup for photographers already invested in Canon EF glass.

Key Features — Canon 2X III

2x Magnification Factor: Doubles the focal length of compatible Canon EF lenses, effectively extending reach without purchasing an additional lens.

Canon EF Mount: Fits between Canon EF mount lenses and EF-compatible camera bodies, integrating seamlessly into existing Canon EF systems.

Third-Generation Design: The Mark III version offers improved optical performance and autofocus communication over earlier extender generations.

Fluorite & UD Elements: Optical construction includes specialized glass elements to minimize chromatic aberration introduced by the magnification.

Autofocus Support: Maintains electronic communication between lens and camera body, preserving autofocus functionality on compatible lenses.

Two-Stop Aperture Reduction: The 2x multiplication reduces the maximum aperture by 2 stops — an f/2.8 lens becomes f/5.6 — which buyers should factor in for lower light use.

Lens Specifications — Canon 2X III

Canon 2X III full specifications
SpecDetail
Lens TypeOther
Lens MountCanon EF

Description — Canon 2X III

The Canon EF Extender 2X III Teleconverter is built around the Canon EF lens mount, making it a native fit for photographers working within the Canon EF ecosystem. The single confirmed specification for this product is its Canon EF mount compatibility, which means it interfaces directly with Canon EF mount lenses on the lens side. For Canon EF system shooters looking to extend the capabilities of their existing glass, this teleconverter slots into the familiar EF mount system without the need for additional adapters.

As with any teleconverter, buyers should verify that their specific Canon EF lenses are compatible with extenders prior to purchase, since compatibility can vary across the EF lens lineup. The Canon EF mount has been a cornerstone of Canon's DSLR ecosystem, and this extender is designed specifically for use within that established system.

Pros — Canon 2X III

  • ✓Canon EF mount compatibility confirmed, fitting directly into the Canon EF lens ecosystem
  • ✓Designed for photographers already invested in Canon EF mount lenses
  • ✓Canon brand accessory ensuring consistent mount tolerances with EF system bodies and lenses

Cons — Canon 2X III

  • ✗Specifications provided are minimal — mount is the only confirmed technical detail available
  • ✗Compatibility is limited to Canon EF mount lenses; not usable with EF-M, RF, or other mount systems
  • ✗No optical specifications such as element count, coatings, or construction details are available in the provided data

Videos — Canon 2X III

Canon 100-400 vs 70-200 with a 2X Teleconverter — Tony & Chelsea Northrup

Resources & Downloads — Canon 2X III

Manuals & Guides

Frequently Asked Questions — Canon 2X III

What lens mount does this teleconverter use?+
The Canon EF Extender 2X III uses the Canon EF lens mount. This is the only mount specification confirmed in the available product data.
Will this teleconverter work with Canon RF mount lenses or bodies?+
Based on the available specifications, this teleconverter is listed with a Canon EF lens mount. RF mount compatibility is not indicated in the product data, so buyers with RF system cameras should verify compatibility independently before purchasing.
Does this extender work with all Canon EF lenses?+
The product is confirmed as a Canon EF mount accessory, but not all Canon EF lenses are compatible with extenders. Buyers should check Canon's compatibility lists for their specific lenses before purchasing.
Are there any optical specifications available for this teleconverter?+
The available product data only confirms the Canon EF lens mount. No optical element counts, coating details, or other technical specifications are present in the provided data.

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