The Canon Extender EF 2x III extends the focal length of your Canon L-Series telephoto or telephoto zoom lens by a factor of 2x without impacting the quality of your image or the performance of the lens. Perfect for press, sports and nature photography, the extender uses anti-reflection materials to reduce flare during use. Additionally, a built-in microprocessor improves autofocus and metering performance, while weather and dust resistant coatings maintain performance.BenefitsExtend the focal length of your lens by 2x without impacting the quality of your image or the performance of your lensCompatible with top-of-the-range Canon EF L-Series telephoto lenses and zoom lensesAnti-reflection materials inside the lens barrel and a special coating around the outer edges help to reduce flareA built-in microprocessor improves communication between camera and lens, improving autofocus and metering performanceThe extender is highly resistant to dust and water, meaning you can use it confidentl