I just have not found a need to manually focus. BTW, I don't know if you are correct about the P mode. IIRC, it is a function of the minimum shutter speed you set, and the aperture setting on your dial. That is, if I set the minumum shutter speed to 1/15 and I dial in f/4, the camera will use f/4 until it it is bright enough that the needed speed is faster than 1/250, after which it starts stopping the lens down. The opposite happens when light gets low. It shoots at f/4 until a speed slower than 1/15 is required, then it starts opening the lens up.