Extended Reach for Canon's L-Series Super Telephoto Lenses
The Canon EF 1.4X III Extender is a professional-grade teleconverter designed for select Canon EF-mount L-series telephoto lenses, built for photographers who need more reach without carrying a heavier, longer telephoto lens. Extending a lens's focal length by a factor of 1.4x, it delivers phenomenal optical performance with minimal chromatic aberration, making it a perfect complement to Canon's super telephoto lineup.
Designed for Wildlife, Sports, and Photojournalism
This extender is made for photographers who need to get closer to distant and challenging subjects, from wildlife and nature photographers to sports shooters and photojournalists. It reduces the need to carry an additional heavy telephoto lens, instead offering meaningful extra reach in a compact accessory that adds almost nothing to a kit bag, weighing just 225g and measuring only 27.2mm in length. Compatible with a wide range of Canon L-series telephoto and zoom lenses, it extends focal length while reducing the effective aperture of the host lens by one stop.
Optical Performance and Build
The optical design consists of 7 elements in 3 groups, engineered specifically to keep chromatic aberration in check at telephoto distances, where color fringing on high-contrast edges is a persistent challenge. All optical elements feature Canon's Super Spectra coating to reduce ghosting and flare, particularly useful when shooting into bright skies or under stadium lighting, while a Fluorine coating on the front and rear elements makes marks like water spots and fingerprints easier to clean in the field. The extender features rugged, dustproof, and water-resistant construction that matches the standards of Canon's L-series lenses.
Seamless Camera Communication
A built-in microcomputer maintains full communication between the camera body, lens, and extender, ensuring focusing, metering, and image data transfer smoothly without dropouts or degraded performance. When paired with the latest range of premium Canon L-series lenses, the extender enables accurate autofocus even when capturing fast-moving subjects.
Key Features at a Glance
- Product: Canon EF 1.4X III Extender
- Mount: Canon EF (for compatible L-series telephoto lenses)
- Magnification factor: 1.4x
- Light loss: 1 stop
- Optical design: 7 elements in 3 groups
- Coatings: Super Spectra Coating, Fluorine Coating
- Build: dustproof and water-resistant construction
- Weight: approx. 225g
- Dimensions: approx. 72.0mm x 27.2mm
- Compatibility: select Canon EF L-series super telephoto and zoom lenses
- Functionality: full autofocus, metering, and EXIF data communication maintained
A Strong Choice for Extending Telephoto Reach
The Canon EF 1.4X III Extender is a smart choice for photographers who want more telephoto reach without investing in a longer, heavier lens. Its combination of near-lossless optical quality, rugged weather-resistant build, and seamless camera communication make it a dependable addition for wildlife, sports, and photojournalism work where every extra millimeter of reach matters.
