I've been doing some indoor tests with the NEX5 and I've been finding out a considerable amount of out of focus shots even when I shoot at 1/50 shutter speed. To keep me from increasing the ISO I've started out shooting 1/10, which with a steady hand I have always managed to do with the GF1 and the 20mm 1.7. I've progressively increased the shutter speed with the NEX+16mm but I was surprised to see more than the usual amount of out of focus shots. And finally at 1/50 I've started wondering if there is some incamera option that is causing this, because at 1/50 is pretty darn hard not to be able to get good focus. My other thought was "Maybe this doesn't have anything to do with shutter speed, maybe this camera just has a hard time locking focus in dim light".