My gut is saying no, at least on the wide end. Have tried the current version of the 1.4x extender [II] on mine, and it hits the lenses optics down in the 28mm+ range. If the picture is correct, this looks to have the same design. :(

I hope I am wrong!

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Anonymous wrote:

 Are these new extenders compatible with the 

 

Canon EF 28-300mm f/3.5-5.6 L IS USM

 

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