Canon EF 2x III Extender
The Canon Extender EF 2x III is a compact and affordable extender which increases the focal length of Canon L-series telephoto or telephoto zoom lens’ by a factor of 2x, with higher AF accuracy making it ideal for press, sports and nature photography. It is highly resistant to dust and water for use in harsh conditions and the built in micro computer enables effective communication between lens and camera. The lens coatings are optimised to minimise ghosting and flare plus its fluorine coating keeps the lens surface clean from water spots and fingerprints
To find out more information on Canon Extenders and to check if your lens is compatible view the Canon website here.