Who has best AF availability / performance when using a TC? Canon, Nikon, or other?

[Brendan Dozier]

Who has best AF availability / performance when using a TC? Canon, Nikon, or other?

[Daniel Cadieux]

Scientifically there is likely a clearcut "winner", but in real world situations and various degrees of user experience / ability the answer is actually quite blurry and variable. Sorry for the generic answer!

[James Shadle]

Canon.
I'm a Nikon shooter and I can tell you Canon's AF performance is much better at apertures smaller than F5.6, I mean it was(1D-X).

[Ken Watkins]

Scientifically there is likely a clearcut "winner", but in real world situations and various degrees of user experience / ability the answer is actually quite blurry and variable. Sorry for the generic answer!

Danile,

Great answer, I do not like to use TC, but then I never use a tripod.

[Brendan Dozier]

Thanks, folks, maybe I'll just forget the TC's and get a Canon EF 1200mm f/5.6 L USM!!

[Doug Brown]

Canon.
I'm a Nikon shooter and I can tell you Canon's AF performance is much better at apertures smaller than F5.6, I mean it was(1D-X).

That's a low blow!!!