Watch as Canon photographer Larry Chen puts the new EOS-1D X Mark III’s autofocus, low light and video capabilities to the test, relying on the cameraWatch as Canon photographer Larry Chen puts the new EOS-1D X Mark III’s autofocus, low light and video capabilities to the test, relying on the cameraWatch as Canon photographer Larry Chen puts the new EOS-1D X Mark III’s autofocus, low light and video capabilities to the test, relying on the camera