Jack, not sure why you said the current Nikon f1.4x won't autofocus with Nikon's 200 f2 AF-S VR I lens. It most certainly will as well as the current 2x! Use of the Nikon 1.4x with this lens was a staple in my shooting as was the occasional use of the 2x. The 1.4x + 200 f2 optically was superb, coming very close to the native 300 f2.8 VR. Use of the 2x was no slouch either although certainly at a level below that of the 1.4x. I have additional comments about all these combinations in a old FS posting here on GETdpi as well as many others who have used this lens with both teleconverters.Okay, finally caved and ordered a 200/2 -- used, VR1 G version. Also ordered a 2x ver III converter and since the Nikon 1.4x won't AF with this lens, I ordered a Sigma 1.4x to try -- not holding my breath on that combo being great though.
Dave (D&A)