Ok, so yesterday my gf bought me a sigma 70-300mm dg macro for my Canon XTi. I had told her that i wanted a macro lens cause i like to shoot little things. Bugs, and such. Imagine my surprise when i try the lens out only to find the minimum focusing distance is 3'... So i have a couple questions about this lens. 1. Is this a quality lens? It's a lot heavier than the kit lens. Are 'pro' lenses much heavier? 2. What would this lens be best for shooting? 3. What lens would i need to be able to shoot the tiny stuff? I think that's it... Thanks in advance for your help, and remember i'm just a novice. Only in my second week at university.