I use it on my AF-S 300mm/2.8 which have an excellent sharpness on D800/D800e, but if sharpness is very good in the center with this TC, when you look to border and corners, you will see color fringes and sharpness loss. That's the reason why Nikon did a new design, more sophisticated, with much better result. See http://imaging.nikon.com/lineup/lens/teleconverters/af-s_tc-14e_3/spec.htmView review in forums Leave a comment on this review
Nikon AF-S Teleconverter TC-14E II
Teleconverter | Nikon F (FX)
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