Autofocus video

just realized I'd posted this on Google+, but not here. Incredibly useful if you have a Canon Camera. Manuals seem to explain how to activate feature X, but often don't both to tell you why you'd bother. This video provides the missing "why".

There's two more videos in this series. Roughly the last half of episode 3 deals with Canon's top of the line cameras. You could safely skip that unless you want to know those cameras can do.