Sigma 17-50/2.8 OS
I'd thought about buying the sigma with the OS and looked into it and asked around and decided that in general it was no gain over the SR in the camera,
Sigma thought so too!
and so not worth having to spend the extra money to get.
I'll be interested in seeing the non OS version when it comes out.
At the same price as the OS version? Will it have a better IQ to justify this price?