both pics shooting using manual mode? for first pic, shld use faster shutter speed.
I've having the same setting. The sigma 18-200 perform better if shoot at good lighting. For my copy F8 hv sharp nice pic. I suggest you looking into the setting.
Yes Bros.
My shot are all in manual mode. (1/80, F8, 173mm, ISO 400) for this also.
http://www.flickr.com/photos/speterjw/3601960869/in/set-72157618772813663/
thanx.