|When shooting video you cannot use the
eye-level finder — you must use ‘Live-View’
and look at the LCD monitor on the back of
When Live View is active, the mirror is up,
therefore the camera must read focus off the
actual imaging sensor. This is called “Live
Alternatively, the camera can stop recording, get out of Live View, lower the mirror, and let the actual AF sensor acquire focus. This method of focus is called “Quick Mode AF”.