The speed of the autofocus system is one arena in which the Alpha 330 shines. It focused faster than the Rebel T1i for the brighter half of our AF test, turning in a blazing 0.27 seconds at the brightest light level, EV 12. And while the Canon locked onto our target faster at EV 2, it wasn't by much-0.57 versus 0.63 sec for the Sony. All the way down at murky EV -1, the A330 focused in a speedy 1.02 sec. That was the limit of the Alpha's AF system-in less light than that, it couldn't focus-while the Rebel was able to focus at EV -2, the dimmest level of our test. Shooting in Live View mode? The Sony uses phase-detection AF, affording a much faster response, as the mirror doesn't have to flip in and out of the light path to allow the camera to focus on your subject. The downside? Because the Sony's live view comes from a separate sensor, you don't get 100-percent framing accuracy.