On Christmas I was shooting a very nice sunrise, but for some reason looking in-camera at the results, none of the trees in the distance looked very sharp. Of course this may be more a function of the LCD than the lens. However, I found if I manually set the focus to infinity, the trees were much MORE OoF than if I let the autofocus handle it. I just think it's weird than manual at infinity = OoF distant objects. Thoughts on that? Here are some samples with 100% crops. Am I just expecting too much from this lens? ISO-1600; f/6.3, 1/13s. ISO-100; f/8, 1/50s. ISO-100, f/7.1, 1/60s. Also, any comments you may have on the pictures are welcome.