I am wondering how many RX1 owners program the focusing function (AF/MF control hold) to the "C" button on the top of the camera. Separating the focusing function from the shutter button is very popular in the DSLR world, but I wondered if there is any real advantage to doing this with the RX1. The usual argument is that focus could change in the instant between between the half press which focuses and the full press which triggers the shutter. That makes sense when you have camera with a continuous autofocus but since the RX1 offers only single (non continuous) focusing when shooting in manual mode, it would seem that you might as well stick with the from the factory half shutter press technique. Does anyone see an advantage to attaching the focus function to its own button?