Looks like your shutter speed is too slow. Unless you are good at holding the camera very steady then any slight movement will cause the pictures to be slightly blurred hence, not looking sharp. Set you shutter speed to at least 250s or even 500s. My D3 is set to 500s for auto shots in programme mode and if I need slower speeds, then I use shutter priority mode or manual. That way the camera is ready for a quick shot without me having to check the speed before taken it.
