Pairs well with the Canon 70-200mm lens and is compatible with the following lenses. This extender 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 and the Sigma 150-600