And so, 4 1/2 years since the original response, I add my input. I have the Tokina 400/5.6 ATX AF and a Nikon TC-14B. These two items in my possession match, mechanically and optically. I lose AF and can only use M or A exposure modes. I bought the Tokina used in 1995. The Nikon is also used and seems very old. Perhaps at some juncture either/or companies changed sizing specs and these two products became disjointed. The shots I take with my combo are excellent!
The Tokina 400mm f5.6 and nature work
in Nature
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