dark...i appreciate your comments and perspective.
Here are mine... I'm feeling pretty good about the AF now, but in my first couple shoots trying different AF settings I, like you, was a little disappointed. But after spending some time playing around with AF settings I've come to a point where I think the AF is great...maybe not excellent, but great.
I've added a couple shots where the AF was challenged...I shot both of these images w/ the 70-200 ii with 2xiii (which obviously slows down AF speed)
the ducks were really flying fast as they were flying downwind
the trumpeter swans were moving quickly and a bit erratic (they were fighting)
both groups of birds were about 150 feet away - I think the autofocus nailed these shots
Really nice shots! Could you please share what your AF settings were e.g. Case 1 through 5 in the AF menu and if you did any further adjustments after selecting a Case.
Dark...my AF settings for now: (a work in progress as most of us 5d3 shooters know)
1. I'm mainly using case 1 and 2 right now. I find simple is better, with time I'll experiment with the others.
2. I'm shooting manual, with single point AF point expansion. Center single focus point and the 8 surrounding points..and I believe 5 of those 9 points are the dual cross type af points.
3. I've selected -ONLY use cross type af points
4. In AI servo I'm using the EQUAL PRIORITY for 1st and 2nd image. (still experimenting here)
5. NEVER using AI FOCUS...either one shot or ai servo
6. I set up my dof button to allow me to switch between one shot and ai servo just by pressing the dof.
hope this helps...and good luck.
oh...just because I love to show off the pooch...another AF example
Pooch is moving very quickly/erratically trying to catch that bouncing ball...it's very cloudy, dark clouds. I shot a burst of about 8 images and all are focused about this good...this was a very casual spur of the moment shot taken w/o much thought,(underexposed, iso too low, shutter speed too low) So I think the AF was challenged here and it came through pretty good.
handheld -straight out of cam JPEG with only cropping and bumping the light.