Camera manufacturers have been utilizing different types of autofocus systems in modern digital cameras. If you'd like a primer on how each one works, here's a fantastic 18-minute video by tech tester Gerald Undone that will bring you up to speed.
One of the most exciting things about Sony's new A6000 is the crazy-fast AF system that's been built in. At just 0.06 seconds of lag, the A6000 claims the title of 'world's fastest AF' and blows most mirrorless cameras and APS-C DSLRs out of the water.
But if you're like us, you're not satisfied with knowing THAT it's fast... you want the WHY and the HOW as well. Fortunately, Sony has just released an episode of LearnTV that answers this question for you, and teaches you a few things about the different types of AF systems while it's at it.