Everything sounds okay. I'm assuming you're using the lens that came with the camera, and that you're taking pictures of objects that are not in motion. To make sure it isn't the "operator ", try taking a picture on a tripod or tabletop. Find an inanimate object with some detail to shoot. Set the camera to f8 or so on Av and the ISO to 200. One shot instead of servo and the 10 sec timer would be good to use. Press the shutter button and stay still as it fires a shot after the yellow timer light counts down. If there is nothing in that picture that is sharp, chances are the camera/lens combo are not calibrated together and need to be sent off to Canon. The Canon 50D, 7D, 5DII, 5DIII, and most of the newer 1-series have Autofocus adjustment controls in the camera menu allowing you to correct for this.