BurgaFlippinMan said:
Wow, of course it has to be....with that lens!!! Dunno how fast AF is compared to AFS ones, but it should suffice, though track events are just brutal on the AF
If using big apertures, then you may have quite a lot of "misses" i guess. One of my technique (rather, what i read from other sports shooters) is to trap the AF while panning or at an exact point (eg finish line, corners). I have only taken cars racing around, not humans though, but shouldn't be a problem since cars are inherently faster than humans.
Use AE-L/AF-L mode in CSM and set for AF, this causes the cam to focus at the active AF point (i use the center pt) when the AF-L/AE-L button is pressed. Aim/compose and then press the shutter to initiate "trap focus". When something crosses the active AF point and is in focus, the shutter trips.
Eg, you press AF-L/AE-L button on the hurdles and cam AFs. Recompose at the space above or near it, then press shutter. Of course make sure you do not cross any object which trips it lar. Runner comes along, you pan and get it in the AF bracket, the shutter trips. Swee. Nothing is fool-proof, not even the fastest USM focusing in the world, this increases your chance and is a technique so do practise it.
