Originally posted by Arpe I too would like to see some real world test, scientificish if possible. I want it to keep up with someone running at you (sprinting) from 50m away right up to the camera. I have no idea if any other brand can even accomplish this.
Depends on what you mean by "right up to".
According to Canon, my camera with a 300/2.8 will track accurately something coming towards you at the following speed/distances:
20 meters / 186mph
10 meters / ~40mph
4 meters / ~6mph
With a wider/shorter lens you'd obviously have much better tracking action at shorter distances as the relative subject movement would be smaller -- not sure what the numbers come out to but I've never had any trouble tracking stuff even close to me.
I think the same AF tracking speed is spec'd for the prosumer bodies and even some of the rebels too... the main thing you get with the pro bodies is that it tracks across the 45 point AF area like this.
Anyway, I don't want this to turn into a Pentax bashing thread or anti-Canon raging from people, but you DID ask.
I do hope the K7 kicks ass AF wise, because it really looks like a superb camera overall. Like a K20D on steroids.