Canon's latest enthusiast digital SLR sports a radical new sensor-based autofocus system, where nearly every pixel is dedicated to phase-detect autofocus. As we come close to completing our review of the Canon EOS 70D, we've run the new AF system through a battery of tests to see what, if anything, it means for the enthusiast shooter. Click through for the whole nine yards, as well as new information about the camera's movie autofocus and Wi-Fi functions.