Genuine Canon Extender EF 1.4x II in excellent condition and fully working. The extender has been well looked after and works flawlessly.

Included:
Canon Extender EF 1.4x II
Front and rear lens caps
Canon pouch/case.

For more information read Ken Rockwell's review.

The Canon Extender EF 1.4x II is a high-performance teleconverter that effectively increases the focal length of compatible lenses while maintaining good image quality and autofocus performance.

Overview
The Canon Extender EF 1.4x II is designed to be used with Canon's high-performance telephoto lenses, multiplying the focal length by 1.4x while reducing the effective aperture by one stop. For example, a 70-200mm f/2.8 lens becomes a 98-280mm f/4 lens when paired with this extender. It is compatible with various Canon L-series lenses, enhancing their reach without the need for a larger, heavier lens

Compatibility
This extender is compatible with most Canon L-series lenses that are 135mm or longer. However, it is not compatible with EF-S lenses or many third-party lenses. Users should check compatibility charts to ensure their specific lens works well with the extender

Conclusion
The Canon Extender EF 1.4x II is an excellent choice for photographers looking to extend the reach of their telephoto lenses without sacrificing too much image quality. While it may introduce some optical degradation, the benefits of increased focal length and maintained autofocus performance make it a valuable addition to any Canon photographer's toolkit.

Selling all of my Canon photography equipment as I've bought a Nikon camera. Please see my other items.