I should have been more specific. Did you use autofocus for the shot? (Sounds like yes, from your description.). Assuming you did, most likely you need to do an AF microadjustment.

To test lens sharpness, use manual focus with Live View at 10x. If it's sharp like that, not with AF, that confirms it.

AFMA tips: http://www.the-digital-picture.com/P...ment-Tips.aspx