After random Googling, I may have discovered a want that I never knew I needed. The Sigma 17-50mm f/2.8 EX DC OS HSM lens. I already have the 18-55mm kit lens that came with my Nikon D5100 but that is like f/3.5 to f/5.6. So 2008, right?

Just wanted to see if anyone had any experience with this lens. I like the low light capabilities from 17 to 50 mm. It is not an expensive lens but I am a tightarse so any light shed on it would be appreciated.