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Canon EF Extender 2x Teleconverter

The Canon 2x III is a lens accessory from Canon — known for its 2x Focal Length Multiplication and Canon EF Mount Interface. Used copies start from $119.99 on GearFocus, with buyer protection on every purchase.

Canon EF Extender 2x Teleconverter

Canon EF Extender 2x Teleconverter

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Canon Extender EF 2x

Condition: Excellent

Product Highlights

  • 2x focal length extension
  • Compatible with select Canon EF lenses
  • Advanced optical design
  • Weather-resistant construction

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Canon Extender EF 2x
Canon Extender EF 2x

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$119.99

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Overview — Canon 2x III

The Canon EF Extender 2x Teleconverter is a lens accessory designed for use with the Canon EF mount system on DSLR cameras. It mounts between compatible Canon EF lenses and the camera body, and supports both autofocus and manual focus operation. The extender is rated for full-frame coverage, making it suitable for use with full-frame Canon DSLR bodies as well as APS-C systems.

Weighing 325g, it adds a moderate amount of mass to a lens-and-body setup, which is worth factoring in for handheld or travel shooting. The accessory carries no image stabilization of its own, so any stabilization in the optical chain depends entirely on the attached lens or camera body. With a Canon EF lens mount interface, it is compatible with the broad Canon EF ecosystem of lenses.

Focus mode options include both auto and manual, giving shooters flexibility depending on subject and lighting conditions. No filter thread is present on this unit, and no maximum aperture reduction data is listed in the specifications. For photographers already invested in the Canon EF DSLR system who want extended reach from their existing glass, this teleconverter offers a mount-compatible, autofocus-capable solution.

Key Features — Canon 2x III

2x Focal Length Multiplication: Doubles the effective focal length of the attached lens, giving you significantly more reach without purchasing a longer lens.

Canon EF Mount Interface: Mounts between compatible Canon EF lenses and any Canon EF-mount DSLR body, fitting seamlessly into an existing Canon ecosystem.

Autofocus Support: Preserves autofocus capability with compatible Canon EF lenses, allowing continued use of AF-based shooting workflows.

Full-Frame Coverage: Rated for full-frame image circles, making it suitable for use on both full-frame and APS-C Canon DSLR bodies.

2-Stop Aperture Reduction: Reduces the maximum aperture of the attached lens by two stops, which affects exposure and may limit autofocus in lower light.

325g Build Weight: Adds 325g to the overall lens-and-body configuration, a factor worth considering for handheld or travel setups.

Specifications — Canon 2x III

Canon 2x III full specifications
SpecDetail
Lens FormatFull Frame
Camera SystemDSLR
Zoom PrimePrime
Auto FocusYes
Focus TypeAuto, Manual
Image StabilizationNone
Weight unitg
Weight value325
Mount lensCanon EF
Compatible MountCanon EF

Description — Canon 2x III

The Canon EF Extender 2x Teleconverter is a Canon EF mount accessory built for DSLR camera systems. It provides full-frame coverage and supports both autofocus and manual focus operation, making it a flexible addition to compatible Canon EF lens setups. Weighing 325g, it adds a manageable load to your existing lens and body combination.

The extender carries no image stabilization of its own, so shooters relying on optical stabilization will need to ensure that capability exists in their attached lens. There is no filter thread on this unit. Designed specifically for the Canon EF lens mount, it slots into the existing Canon DSLR ecosystem without requiring additional adapters for compatible EF bodies and lenses.

Whether shooting with auto or manual focus, this extender gives Canon DSLR photographers an option for extending the reach of their current glass using a fully mount-native accessory.

Pros — Canon 2x III

  • ✓Supports both autofocus and manual focus, offering flexibility across shooting scenarios
  • ✓Compatible with the Canon EF mount, fitting a wide range of Canon DSLR lenses and bodies
  • ✓Full-frame rated coverage, suitable for use with full-frame Canon DSLR cameras

Cons — Canon 2x III

  • ✗No image stabilization — any optical stabilization must come from the attached lens or camera body
  • ✗No filter thread present, limiting direct filter attachment to this accessory
  • ✗Focal length extension data and aperture impact values are not listed in specifications, making it harder to evaluate performance trade-offs without testing

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 camera system and mount does this teleconverter work with?+
This extender is designed for the Canon EF mount on DSLR cameras. It is compatible with lenses and bodies using the Canon EF lens mount interface.
Does this teleconverter support autofocus?+
Yes, autofocus is supported, along with manual focus. This gives shooters the option to use either focus mode depending on the situation.
Is image stabilization included in this extender?+
No, the specifications indicate image stabilization is listed as None on this accessory. Any stabilization in your setup will need to come from the attached lens or camera body.
Is this extender compatible with full-frame Canon DSLR cameras?+
Yes, the lens format is listed as Full Frame, confirming it is rated for full-frame coverage and compatible with full-frame Canon DSLR bodies.
How much does this teleconverter weigh?+
The extender weighs 325g according to the listed specifications. This is worth accounting for when building out a lens and body combination, particularly for handheld shooting.
Does this accessory have a filter thread?+
No filter thread size is listed in the specifications for this extender, so direct filter attachment to the accessory itself is not supported.

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