Name: Canon EF Extender 1.4x III Teleconverter
Brand: Canon
SKU: UCE-10-4970-2 6410000686
Price: 305.59 USD
Availability: OutOfStock

Flawless appearance with no cosmetic blemishes. Fully operational and includes all items shown in the listing photos. The actual item for sale is pictured unless specifically noted otherwise. The condition rating applies to the core item and not any accessories.

Boost your Canon EF lens reach with the 1.4x III Extender for sharper wildlife and sports shots. Shop now for trusted performance.

The Canon EF Extender 1.4X III Teleconverter is a high-performance accessory designed to extend the focal length of compatible Canon EF lenses by 1.4 times, making it ideal for wildlife, sports, and birding photography. It features advanced optics and coatings to maintain image quality and minimize aberrations.

Increases the effective focal length of compatible lenses by 1.4 times, providing greater reach for distant subjects.

1.4x Magnification

Incorporates high-quality lens elements and coatings to ensure sharpness and minimize chromatic aberrations.

Advanced Optics

Designed to withstand challenging environments, with robust weather sealing to protect against dust and moisture.

Weather-Sealed Construction

Optimized for use with select Canon EF telephoto and super-telephoto lenses.

Compatibility with Canon EF Lenses

The Canon EF Extender 1.4X III Teleconverter is built around the **Canon EF** lens mount and is designed specifically for **DSLR** cameras operating within the Canon EF system. It supports a **full-frame** lens format, making it compatible with Canon's full-frame EF lens lineup. One of its key practical strengths is **autofocus support**, with both **auto and manual focus** modes available depending on the attached lens and shooting preference. The extender falls into the **telephoto** focal length range category and is classified as a **prime** configuration — it is a fixed-magnification device rather than a variable one. At **225g**, it adds a manageable amount of weight to a shooting kit. Image stabilization is listed as **None** on the extender itself, so photographers relying on optical stabilization will need to ensure their attached lens provides it. No filter thread size is listed in the specifications. Overall, this accessory is a Canon-native EF system solution for DSLR shooters looking to extend their telephoto reach while retaining autofocus capability.

Multiplies the focal length of compatible Canon EF lenses by 1.4x, effectively turning a 300mm lens into a 420mm for increased reach.

1.4x Focal Length Extension

Reduces maximum aperture by one stop, so a lens with f/2.8 becomes f/4 when the extender is attached.

1-Stop Light Reduction

Retains autofocus functionality with compatible Canon EF telephoto lenses, allowing uninterrupted AF operation in the field.

Autofocus Compatible

Passes full electronic communication between camera body and lens, preserving EXIF data, metering, and AF systems natively.

Canon EF Mount

The Mark III version features an updated optical formula with improved coatings to reduce chromatic aberration and maintain image quality compared to earlier versions.

Third-Generation Optics

Designed for Canon's full-frame EF ecosystem, making it compatible with both full-frame and APS-C Canon DSLR bodies.

Full-Frame Coverage

At 225g, the extender adds minimal weight to a telephoto setup, keeping it practical for travel and field use.

Compact at 225g

Supports both AF and MF operation, giving photographers the flexibility to switch focus modes depending on the shooting situation.

Auto and Manual Focus

User Manual

Canon EF Extender 1.4X III Teleconverter

Canon EF 1.4x III Extender Review | Using Canon 7D II & Canon 100-400mm f/4.5-5.6 II

Canon EF 2X III Extender | Review & Overview

Canon Lens Extender EF 1.4X III - Bad Image Quality?

The Canon EF Extender 1.4x III Teleconverter is a practical accessory for photographers looking to increase reach without changing lenses. This like new extender is a great option for wildlife, sports, and other situations where extra focal length can make a difference while maintaining a compact kit. Key Features<ul><li>1.4x Magnification: Extends the reach of compatible Canon EF lenses for tighter framing and added flexibility.</li><li>Canon EF Compatibility: Designed for use with select Canon EF lens and camera combinations.</li><li>Maintains a Compact Setup: Adds focal length without the bulk of carrying an additional long lens.</li><li>Ideal for Reach-Driven Shooting: Useful for wildlife, action, and distant subjects where framing options matter.</li><li>Like New Condition: Well-kept and ready to support your next shoot with confidence.</li></ul> If you need a simple way to get more from your compatible telephoto lenses, this Canon extender is a smart and convenient addition to your kit.

Spec	Detail
Lens Format	Full Frame
Camera System	DSLR
Zoom Prime	Prime
Auto Focus	Yes
Focus Type	Auto, Manual
Focal Length Range	Telephoto
Image Stabilization	None
Weight unit	g
Weight value	225
Mount lens	Canon EF
Compatible Mount	Canon EF

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Canon EF Extender 1.4x III Teleconverter

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