tamron teleconverters

hello,
i noticed that there are two 1.4x TC that tamron offers. One is the regular one and the other is this SP PRO version which is a tad more expensive and it's in white. I don't care about the colour. In fact i rather black. Anyhow what is the difference b/t the two? Do I need the SP PRO version? This is for the Tokina 80-200 f2.8 lens.

thanks.

the pro will only work on telephoto lenses, and reports a stop of light lose to the camera. the non pro works on any lens (i think) and will not report light lose to the camera (although the camera will still meter correctly). therefore for lenses like the 400 5.6 it is the better choice because it allows autofocus. for you, i belive either will work fine. and the pro probably has a bit better image quality. mabye look at the sigma tcs aswell, ive heard they work well, and are black.

The SP is better quality, will work on any lens. You may not be too happy with the results of any TC with that lens though.

The black version will work fine. Your lens will retain AF since it doesn't report the settings to the camera.

I have the 1.4 MC4 one and it works on my Sigma 70-200 2.8 without problem.