[mylivingsky]

Nikkor 18-200
http://www.slrgear.com/reviews/showproduct.php/product/250/sort/2/cat/13/page/1

Sigma 18-200
http://www.slrgear.com/reviews/showproduct.php/product/175/sort/2/cat/31/page/3

What do you think about this comparsion? I lean toward for the Sigma. It seems to me that in F 8, the Sigma even perform better than the Nikkor. Am I correctly interpretating the figure and charts?

Please advice.