Unfortunately I no longer have reliable access to the Tamron 17-50 f/2.8 non-VC that I have used for over a year on my 7D. It's the property of my employer, and now that we have a dedicated media guy instead of me filling a gap, it stays on his T3i. So that leaves me without a general purpose zoom. In fact, the widest lens I have is the Zeiss 35 f/2, and after that it's the Canon 70-300L.


The Zeiss is amazing and I've thought about trying to rely just on it, but the MF really limits its applications.I'd love the Canon 17-55 f/2.8, but $1100 just doesn't seem right for an EF-S lens. The Canon 15-85 seems great, but I shoot at f/2.8 A LOT and would miss it.


The Tammy has worked quite well for me, especially after a +5 MA. It is quite sharp with great colors and contrast even at f/2.8 -- especially when you consider that it's a $450 lens. But before I spring for another one, I wanted to get opinions about the Sigma, which is $200 more but has IS/OS.


So, what do you say? Thanks for sharing your insights.


Brian