Is the Canon EF 50mm f2.5 Macro a good macro lenses for a newbie? I want to get more into macro photography, for nothing other than personal gain/interest, and am wondering if this is going to be a better purchase for me than a set of extension tubes. I've done some light research and worry about DOF field issues with ET's. I only have my two kit lenses and feel restricted to what I can do with macro. I also realize that lighting is a HUGE part of macro photography. I don't have an external flash and would have to rely on natural lighting for my macro shots, which i'm not opposed to. Can anybody experienced with this shed some light for me? My issue is that extention tubes will cost me about $180 shipped and I can get this macro lens around $300. Is it worth the extra change?