When I am shooting HD video, the camera is constantly auto focusing (which causes the video to get blurry for a few seconds). It's a horrible viewing experience. I am usually shooting indoors with normal indoor lighting. Is there some setting I need to check or uncheck? Does anyone else have this problem? Am I too close to the object I'm trying to film? I just don't get why in a 1 minute video clip of my son crawling on the floor my camera has to adjust the focus like 4 times.