Hi, I'm on a budget and would like to get both a zoom and macro lens in one. I see mostly fixed macro lenses used here. In a few posts, I've seen the Sigma 70-300mm APO DG Macro. What's your opinion of that lens? What are the zoom/macros that are better than that one?
Ed, you may be looking for an impossible combination. Many lenses claim to be macro, but don't come anywhere near 1:1 magnification. The lens you've asked about achieves no better than 1:2 and that's at a minimum focussing distance of 1.5m (59.1 inches). However, that magnification is a good deal better than you'll get from most zoom lenses, so may not be a bad option if 1:2 is macro enough for you. It would no doubt be a good choice for butterflies and other larger subjects.