Name: Canon EF Extender 1.4X III Teleconverter - Used, Excellent Condition
Brand: Canon
Price: 325 USD
Availability: InStock

Exhibits minimal signs of wear, noticeable only upon close inspection. 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.

Selling my Canon EF Extender 1.4X III Teleconverter since I really don't photograph sports anymore, which is when I would use this converter, and...read more.

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?

Selling my Canon EF Extender 1.4X III Teleconverter since I really don't photograph sports anymore, which is when I would use this converter, and I recently sold my EF 70-200. Comes with the soft case (the drawstring broke unfortuantely). 

Selling my Canon EF Extender 1.4X III Teleconverter since I really don't photograph sports anymore, which is when I would use this converter, and I recently sold my EF 70-200. Comes with the soft case (the drawstring broke unfortuantely).

Canon EF Extender 1.4X III Teleconverter - Used, Excellent Condition

<h3 class="text-[1.5rem] font-semibold">100% Refund Guarantee for Lost, Damaged, or Misrepresented Items</h3>
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<ol class="text-[1.3rem]">
<li>Contact the Seller: If there's an issue, contact the seller within 48 hours of delivery. Many problems can be resolved directly through their return policy. Be sure to provide clear photos or videos when messaging the seller.</li>
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<h3 class="text-[1.5rem] font-semibold">What&rsquo;s Covered?</h3>
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You qualify for a refund if your item is:
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<li>Lost by the carrier</li>
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<h3 class="text-[1.5rem] font-semibold">Seller Return Policies &ndash; Know Before You Buy</h3>
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<h3 class="text-[1.5rem] font-semibold">Return Policies Include:</h3>
<ul class="text-[1.3rem]">
<li>48-Hour Verification Period (For Verified Sellers): Buyers have 48 hours to inspect the item upon delivery. If discrepancies are found, the seller covers return shipping. (Excludes "As-Is" and "Poor" condition items)</li>
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<h3 class="text-[1.5rem] font-semibold">Exceptional Cases &ndash; Returns Outside the Seller&rsquo;s Policy</h3>
Occasionally, a seller may offer to accept a return outside of their stated policy. When this occurs:
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<h3 class="text-[1.5rem] font-semibold">What Isn&rsquo;t Covered?</h3>
<ul class="text-[1.3rem]">
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Canon EF Extender 1.4X III Teleconverter - Used, Excellent Condition

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