Focal length extension for super telephoto lenses

The EF 2x III Extender is specially designed to pair with L-series Image Stabilizer super-telephoto lenses, doubling their focal length. The multiplier helps prevent any loss of image quality and performance.

High quality construction

An improved anti-reflective coating in the lens barrel and a coating around the edges of the lens elements help reduce reflections. With a dust and water resistant construction, image quality is guaranteed.

Better communication between camera and lens

A built-in microprocessor allows data to be accurately transferred from the lens to the camera, improving autofocus and metering performance.

Compatible with Canon L series optical zooms and telephoto lenses

The EF 2x III extender is compatible with most telephoto and zoom lenses from Canon's iconic professional L series, extending the focal length while only reducing the effective aperture of the lens by two stops.