

Canon
CANON EXTENDER EF 1.4X III - SECOND HAND
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CANON EXTENDER EF 1.4X III – SECOND HAND
The Canon Extender EF 1.4x III – Second Hand is a professional teleconverter designed to increase the focal length of select compatible Canon EF L-series telephoto and super-telephoto lenses by 1.4x, giving photographers additional reach without requiring a longer dedicated lens. Particularly useful for wildlife, bird, sports, motorsport, aviation and outdoor photography, the Extender EF 1.4x III can turn a compatible 400mm lens into an effective 560mm combination, or a compatible 300mm lens into 420mm, while maintaining electronic communication between the camera and supported lens. Canon designed the third-generation extender with a high-quality 7-element, 3-group optical construction, incorporating advanced optical materials and coatings to help maintain image quality, contrast and colour accuracy when additional magnification is required. The internal optical surfaces feature Canon's Super Spectra Coating to help reduce ghosting and flare, while the exterior front and rear elements feature a fluorine coating that helps resist fingerprints, smears and dirt and makes the surfaces easier to clean. When attached, the extender produces a one-stop reduction in maximum aperture, meaning an f/2.8 lens becomes effectively f/4 and an f/4 lens becomes effectively f/5.6, while providing the benefit of 40% additional focal length. The Extender EF 1.4x III also incorporates an integrated microcomputer for communication between compatible Canon cameras and lenses, helping support autofocus, exposure information and lens data where the specific camera-and-lens combination allows it. Built for demanding professional environments, its robust construction includes dust- and water-resistant sealing when paired with appropriately weather-resistant compatible equipment. Compact and lightweight compared with carrying an additional super-telephoto lens, the Canon Extender EF 1.4x III – Second Hand is an excellent addition to a compatible Canon EF telephoto system for photographers who regularly need extra reach while retaining the flexibility and optical performance of their existing professional lenses.
Key Features:
- 1.4x Focal Length Extension – Increases the focal length of a compatible Canon EF telephoto or super-telephoto lens by 1.4x, providing substantially more reach for distant subjects.
- Ideal for Wildlife Photography – Provides additional focal length for photographing wildlife from greater distances, making it particularly useful for animals that cannot easily be approached.
- Excellent for Bird Photography – The additional 1.4x magnification can help photographers achieve tighter compositions of birds and other small, distant subjects.
- Great for Sports Photography – Extends the reach of compatible professional Canon telephoto lenses when photographing field sports, athletics and other action from a distance.
- Suitable for Motorsport Photography – Additional reach can be valuable when photographing cars and motorcycles from designated spectator or trackside shooting positions.
- Useful for Aviation Photography – Helps photographers achieve tighter framing of aircraft and other distant subjects when used with a suitable compatible telephoto lens.
- Professional Canon EF Extender – Designed specifically for use with select compatible Canon EF telephoto and super-telephoto lenses rather than acting as a universal adapter for every Canon EF lens.
- 7-Element, 3-Group Optical Design – Uses a sophisticated optical construction engineered to provide additional magnification while maintaining strong image quality from compatible Canon lenses.
- Super Spectra Coating – Canon's optical coating technology helps reduce internal reflections, flare and ghosting while supporting strong contrast and colour reproduction.
- Fluorine Coating – Protective fluorine coating on the exposed front and rear optical surfaces helps resist fingerprints, smears and dirt while making routine cleaning easier.
- One-Stop Maximum Aperture Reduction – Using a 1.4x teleconverter reduces the effective maximum aperture by one stop, an important consideration when calculating exposure and autofocus performance.
- Turns an f/2.8 Lens into an Effective f/4 Combination – A compatible f/2.8 telephoto lens will have an effective maximum aperture of f/4 when used with the 1.4x extender.
- Turns an f/4 Lens into an Effective f/5.6 Combination – A compatible f/4 lens becomes an effective f/5.6 combination while gaining 40% additional focal length.
- 300mm Becomes 420mm – A compatible 300mm lens provides a 420mm focal length when paired with the Canon Extender EF 1.4x III.
- 400mm Becomes 560mm – A compatible 400mm lens becomes a powerful 560mm setup, providing significantly greater reach for wildlife, birds, sport and distant subjects.
- 500mm Becomes 700mm – Pairing the extender with a compatible 500mm lens increases the resulting focal length to 700mm.
- 600mm Becomes 840mm – A compatible Canon 600mm super-telephoto lens becomes an 840mm combination, providing exceptional reach for distant subjects.
- Maintains Electronic Communication – Designed to retain electronic communication between compatible Canon camera bodies and supported EF lenses.
- Autofocus Support with Compatible Equipment – Autofocus functionality can be maintained when the specific camera, lens, effective aperture and extender combination supports AF operation.
- Exposure Communication – Compatible Canon cameras can account for the extender when determining exposure information and communicating with the attached lens.
- Integrated Microcomputer – Built-in electronics facilitate communication between compatible Canon EOS cameras, the extender and supported EF lenses.
- Designed for Professional Telephoto Lenses – Particularly suited to photographers already using compatible Canon L-series telephoto and super-telephoto lenses and looking to expand their available focal lengths.
- Compact Way to Gain Extra Reach – Provides a more portable method of increasing focal length than carrying an additional longer super-telephoto lens.
- Useful for Travel & Safari Photography – The compact form factor makes an extender especially useful when photographers need additional reach but want to minimise the amount of large equipment being transported.
- Weather-Resistant Construction – Designed with dust- and water-resistant sealing for demanding professional shooting environments when used with appropriately sealed compatible equipment.
- Built for Outdoor Photography – Robust construction makes it well suited to wildlife reserves, sports fields, motorsport circuits and other demanding outdoor shooting environments.
- Maintains Existing Lens Flexibility – Allows photographers to gain additional reach from a compatible lens and remove the extender when the original focal length or wider maximum aperture is preferred.
- Easy to Add or Remove – Mounts between a compatible Canon EF camera and compatible EF lens, allowing photographers to adapt their telephoto setup according to the subject and shooting distance.
- Compatible with Select Canon EF Lenses Only – The Extender EF 1.4x III is not compatible with every Canon EF or EF-S lens. Compatibility should be confirmed for the specific lens before use.
- Not an EF-to-RF Mount Adapter – This product is a teleconverter designed to increase focal length; it does not independently convert an EF lens for mounting onto an RF camera body.
- EOS R System Use Requires Appropriate EF-EOS R Adapter – Compatible EF lens and extender combinations may be used with suitable EOS R mirrorless bodies through an appropriate Canon EF-EOS R mount adapter, subject to the compatibility of the complete camera, extender and lens combination.
- Excellent Addition to a Canon Telephoto Kit – For photographers already invested in compatible Canon EF telephoto lenses, the extender provides another focal-length option without adding a completely separate super-telephoto lens.
- Second-Hand Value – Purchasing the Canon Extender EF 1.4x III second hand provides photographers with access to Canon's professional third-generation 1.4x EF teleconverter at a potentially more accessible price than purchasing new.
- Professional Teleconverter for Extra Reach – Combining 1.4x focal-length magnification, high-quality Canon optics, Super Spectra Coating, fluorine-coated external elements, electronic communication and professional construction, the Canon Extender EF 1.4x III – Second Hand is a highly practical accessory for compatible Canon telephoto photographers who need additional reach for wildlife, birds, sport, motorsport, aviation and other distant subjects.
