I picked up a Sony RX1 and have been playing with the C button, AEL button and some of the options to figure out the best way to focus and expose. With my Canon gear I used to press my right thumb on a button to focus at the center point and I'd half press the shutter to lock exposure. I did this because I was under the impression that the CENTER focal point was always the fastest and sharpest on the 40D camera and 20-70mm L lens I had. For the RX1, is the center focal point the best point to use? I'd love to hear some examples of how you focus and expose with this camera.