Canon EF 1.4x III Extender - 2 Year Warranty - UK NEXT DAY DELIVERY
This lens is only compatible with fixed focal length L-series lenses 135mm and over, as well as the EF 70-200/2.8L, EF 70-200/2.8L IS, EF 70-200/4L, and EF 100-400/4.5-5.6L. Canon extender 1.4 x III Key Features.