Well, I just recieved my Sigma 70-200 f/2.8 from B&H which was delivered just as they said and on time. First off WOW, it is a tank and weighs as such Makes my D40 look like a toy It fits just fine on my D40 and focuses great. Know I have to learn to use it to its fullest. Everything about the lens feels very well made and is in working order. Any tips about using f/2.8 in low light (such a s settings) would be great. I will play around more after work.