Does anyone have any experience/samples with this lens combination? Whats the good/bad about this combo? What do you shoot with it? How is the AF speed, and how well does it work with AI Servo tracking? Do you have to adjust MA for autofocus when using the extender?
Im using a 5DIII and probably wont go to f/8, so Im not too worried about AF at f/8 with the 2x extender (even though there is a firmwareupdate on the horizon to fix this).