Thanks, William for the exhaustive explanation! I've been debating which lens to buy and was going to settle for the Nikon 85mm f1.8 as a stopgap. My problem at the moment is I'm waiting for Nikon to come out new DSLR models which is taking forever. (However, Nikon has just been reported to have registered a new unidentified one in Indonesia) In fact, I have the exact same camera as you do but with just the kit lenses. So, I'm hesitant shell out big bucks for lens until I know which camera I'll be using for sure, as my other consideration is the Sony AR II. After reading your last post about using higher range lens, I found the Tokina 100mm f2.8 (150 mm my camera) which has had great reviews for a very decent price. So I'm considering getting this one for now and when I get a new camera, I'll be saving and lusting for the Sigma Art lenses!
