I received mine from B&H yesterday before I left on a business trip, so no time to carefully test and post images yet, but I did take a few casual shots and checked them on my laptop (crappy monitor though). The sharpness corner to corner is clearly better than my kit lens at all f stops, but decidedly better wide open. Also, the barrel distortion is less pronounced on my Sigma regardless of focus distance. I'll post my pics when I get home, but look forward to checking this thread as example shots come in. I was a little disappointed in my kit lens, hence this purchase.