谢谢U班! I will keep the number in mind.

回答: 这张照片的问题和镜头无关。光线较差，快门速度过低加上手抖了。 由 U96 于 2010-08-29 18:44:15

My problem is I don't check my camera sitting carefully before shoting -- most shots are spontanous. I need good habits and more practice. Thanks again.