According to DPReview, Sigma has just released a DG-optimized version of their 180/3.5 macro. Now there is a 50, 100, 150 and 180 macro. Then there is Sigmas large collection of normals: 18-50 (28-something cropped), 24-60, 24-70, 28-70, 18-125, etc... My question is, why does Sigma keep releasing pretty much the same glass over and over again, and not some USEFUL glass. How about a 70-200IS? That would rule and surely save a lot of people a lot of money. How about a 24-70IS? That too, would rule. And how about some TS-glass for us folks who would like to try tilting and shifting building but don't feel like plonking down 1000$ just to experiment a little? Weird thinkers, them there Sigma folks.