Canon Extender II Compatibility Chart as of May 2008. Newer lenses should work, too. enlarge. Be careful: since you lose two stops of light, your camera's autofocus may not be happy if your main lens is only f/4 or slower. Specifications top Intro Specs Performance Compared Usage Recommendations More NameThe Canon 2x EF Extender is designed to work with Canon L lenses. There is a link on this page which leads to a compatibility chart showing all lenses that it works with. Lens Extender compatibility with EOS 5D Mark IV and EF 70-200 f/2.8L IS II USM lens in EOS DSLR & Mirrorless Cameras 12-19-2023; Extender EF 1.4x III compatible with EF mount? in Camera Accessories 12-18-2023; Extender EF 1.4x compatibility with Mount Adapter EF-EOS R in Camera Accessories 12-05-2023 If Canon could have delivered the same performance in terms of optics, size and weight while increasing the compatibility of the TCs, they would have done so, I believe. So, while we don't know the exact compromise we avoided, I think we got what Canon thinks the majority of the market wants most: Less size and weight with options for greater
Use the compatibility chart below to find your answer. If you are still undecided, get in touch via Livechat and we can guide you towards the right product. MF Only Can only be used for manual focus. F/8 Only Lens will only operate at F/8 or above.
EF 75-300mm f/4-5.6 II USM: EF 75-300mm f/4-5.6 III: The Digital Lens Optimizer is also available for images shot with an extender attached to a compatible lens.
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