I am curious about how the Auto function to adjust the background focus works. The function is only available when Quality is set to jpeg (e.g., Fine) and not for RAWs. But adjusting the background focus is a function of aperture, distances and focal length, so why is it not available for RAW files? I mean, one can certainly do that manually in P or Manual modes (adjust the aperture that is). so does that mean that the Auto function is adjusting the background focus some other way (e.g., post processing)?