I have a sigma 17-70 2.8/4.5 on my Eos 30D , good range and with F2.8 at 17mm is handy in low light, i was going to buy a canon 17-85 but all reviews i read said it was average and the packaged 18-55 isnt worth the plastic its made from. The IS 18-55 has good reviews but the siggy won it for me and didnt break the bank.

