Can anyone tell me if the Canon 1.75x teleconverter is equal in performance and quality to the Olympus 1.7x teleconverter? Anyone has experience with this? The reason I am asking, I bought the Canon one for my Olympus 4000-Z camera, and so far so good, except at some occassions I have hard time focusing it. Is there any difference between these two lenses? Thanks for any advice.
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