With Canon's Hybrid CMOS AF System and Movie Servo AF, the camera provides continuous AF for focus tracking of moving subjects by helping to reduce the camera's need to "hunt", resulting in a quick and smooth continuous AF.

ENGADGET: Canon unveils EOS T5i and Rebel SL1, the world's smallest DSLR (hands-on)

To help avoid overemphasis on the horse race and focus instead on what's driving the election, the tracking poll has begun to ask a series of questions on issues and events.

CNN: About the Tracking Polls

It has improved focus tracking, so if you're autofocusing something that's moving, all of the sensors can concert with one another and track the subject better.

ENGADGET: The Engadget Interview: Steve Heiner, General Manager, Digital SLR Systems, Nikon