I've been thinking of upgrading my T1i kit lens to the Sigma 17-50 F/2.8 EX OS HSM lens. There's not a lot out there on the lens in way of reviews, but I've read several people here that say that it's a nice alternative to the Canon 18-55 f/2.8 lens in terms of dollar for dollar value.
But looking here, at these 100% crop images, it almost appears that the kit lens does a better job in terms of IQ. Am I missing something, or is what I'm looking at not a good indication of what I'll get for spending close to 7 bills. Anyone have any insight?