I came across this Fringer EF-NZ adaptor on Amazon and Ken Rockwell reviewed it. It seems it'll work with all but my 300mm f/2.8 from 1988 as it has a weird focus system. However, my question is more if anyone has tried it and seen if it'll give IBIS to the 200mm f/2.8 and 70-200mm f/4 non IS L lenses?
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