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. Check GearFocus for current availability, with buyer protection on every purchase.
Canon EF Extender 2x Teleconverter
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Canon EF Extender 1.4X III Teleconverter - Used, Excellent Condition
Overview — Canon 2x III
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
| Spec | Detail |
|---|---|
| Lens Format | Full Frame |
| Camera System | DSLR |
| Zoom Prime | Prime |
| Auto Focus | Yes |
| Focus Type | Auto, Manual |
| Image Stabilization | None |
| Weight unit | g |
| Weight value | 325 |
| Mount lens | Canon EF |
| Compatible Mount | Canon 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