There are already a surprising amount of Reviews/Previews hitting the web for the new Fujinon XF2X TC WR. From what I can gather from reviews, the Fujinon XF 50-140mm F2.8 R LM OIS WR seems to work best with the Fujinon XF2X TC WR teleconverter, while the Fujinon XF100-400mm F4.5-5.6 R LM OIS WR noticeably deteriorates in performance.
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