Hello to Everybody Could you help me which lens for EOS 30/33v? I am looking for standard zoom. Now I'm wondering betwwen 1. Canon EF 28-105mm f/3,5-4,5 II USM 2. Sigma 28-135/3.8-5.6 IF Macro I'm willing to buy Canon but I am waiting for Your opinions, experience at work with these lenses or other suggestions. Is it that Sigma worth to buy and compatible with EOS 30/33v?