The Canon Extender EF 2x III is a high-performance teleconverter designed to increase the effective focal length of compatible Canon L-series telephoto and telephoto zoom lenses by 2x, effectively doubling their reach. This extender is ideal for photographers who need extra magnification for shooting distant subjects, such as in sports, wildlife, and nature photography, without sacrificing image quality. The EF 2x III maintains Canon’s high optical standards while offering a compact and cost-effective solution for extending telephoto range.

Key Features:

• 2x Magnification: The Canon Extender EF 2x III doubles the focal length of compatible lenses, turning a 200mm lens into a 400mm and a 400mm into an 800mm, giving photographers significantly more reach for capturing distant subjects.
• Advanced Optics: Designed to work seamlessly with Canon’s high-end telephoto lenses, this extender features improved optics with nine elements in five groups, including one fluorite and multiple Super UD (Ultra-Low Dispersion) elements. These reduce chromatic aberrations and maintain sharpness, contrast, and color fidelity across the extended focal range.
• Coatings and Weather Sealing: The extender is equipped with Canon’s advanced Super Spectra Coating, which minimizes ghosting, flare, and reflections. The front and rear elements have a fluorine coating to resist dust, dirt, and smudges, making it easier to clean. Its weather-sealed construction ensures reliability in challenging conditions, matching the durability of Canon’s L-series lenses.
• Enhanced Autofocus Performance: When used with compatible lenses and cameras, the Canon EF 2x III helps maintain accurate and responsive autofocus, especially with high-performance bodies like those from the EOS-1D series. Although autofocus performance may be slightly reduced with certain lens-camera combinations, the extender is optimized for use with Canon’s advanced autofocus systems.
• Compatibility: The Canon Extender EF 2x III is compatible with many of Canon’s top-tier L-series telephoto lenses, including popular models like the 70-200mm f/2.8L IS II USM and 100-400mm f/4.5-5.6L IS II USM. It’s designed to work seamlessly with Canon’s pro bodies for superior optical performance.

The Canon Extender EF 2x III is an excellent accessory for photographers seeking to extend the reach of their existing Canon L-series telephoto lenses while maintaining high image quality and performance. Its advanced optics, robust build, and weather-resistant design make it a reliable choice for professionals and enthusiasts alike. Whether you’re shooting sports, wildlife, or distant landscapes, the EF 2x III provides a versatile and cost-effective way to get closer to the action without sacrificing the superb image quality that Canon lenses are known for.