I’ve just finished reading an interesting thread discussing the relative merits of purchasing the Nikkor 600 or 800mm lens. In the thread, there was discussion of the 1.4 TC and one comment suggested that the IQ of the III version was better than the II version. I seem to remember reading comparisons of the two that essentially concluded it was a draw. In fact, I think I recall Steve discussing the issue. I have the II version and am now wondering whether it’s worth switching to version III. Your thoughts would be appreciate?