All Sigma Test shots made 2-4 feet from chart and at a 45 degree angle with center focus point on center line with camera mounted on heavy duty Bogen tripod. Autofocus point confirmed with EOS Viewer. Only adjustments to images were white point and crop. Otherwise neutral settings (Parameter 2) used on EOS 20D. As you can see, this lens on the 20D consistently front-focused. A shame, really, because it appeared to have great potential.