Macro

Taken with my latest lens, a Sigma 150mm f2.8 APO Macro DG EX HSM.

All I can say is that it's a peach. Sharp, fast, lovely build and sharp - did I mention it's sharp. It's noticeably cheaper than the closest Nikor (the 105mm), and just as good. I also find it makes a great middle-distance telephoto - I've taken some of the best pics of my cat with it.