I have a Sony DSC-P100, I've had for some time now and the thing is that I can't keep some of my shots focused. I have adjusted the auto focus, scene selection to sports and just can't seem to get the camera to get some good, quality non-blurry pictures. I have read the manual and it states that you hold the button half way until the camera let's you know that it's focused then press all the way. I do that but it's only good if my subject are still or barely moving. Even if I move my hand while taking a picture and holding the camera will get blurry photos.I took a group shot and someone moved their head to the left, when they moved their head, it was a blurry image while everyone who was still was a clear. Any suggestions?