esoeij
Senior Member
I think that IS on the 24-70mm lens is a good-to-have, but not a must-have, unless you need to shoot at really low shutter speeds, say less than 1/50 most of the time and you can't use a tripod/monopod. As for the Tamron VC version, you can go google the reviews or go browse the Tamron thread on this lens. It's generally got pretty positive reviews and at its current street price of about S$1688, it's more than S$1000 cheaper than the Canon Mk2.