Canon Lens Cap Diameter 58mm

Note:
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.
Additionally, please see the lens and/or camera body manual for full compatibility information with the Extender EF 1.4x III.