I'm looking to upgrade to a Canon 5D Mk II because I like close proximity street scenes as well as indoor photography in big open spaces or where flash is a no-no. This will lead me to a lens something like an EF 16-35 f/2.8L II USM ... but no IS.
I'm wondering if you have this kind of setup, shooting indoors hand-holding where the light is really low and you can't get enough shutter speed with ISOs up to 1600, can you keep upping the ISO until you get enough? I've read that with a full frame sensor, you can go pretty high with the ISO without getting excessive noise.
I'm guessing that the IS - even if you had it - would only be effective for 2 or 3 stops anyway, and in this extreme condition, the ISO would be your best savior?? Thanks a lot.