I have an Olympus Evolt E-500 that I would like to get a macro lens for. I don't know much and what I should get or the differences between certain lenses. I plan on buying off Ebay or another place to get it cheaper, and my limit is 400, but much preferably around 300 dollars. I want a lens that can zoom more, maybe when shooting insects. These are the most common I've found. Olympus 261003 Camera Lens - Yahoo! Shopping Olympus 261053 Camera Lens - Yahoo! Shopping Is there a huge difference in quality? There's definitely a huge difference in price. I know the 50 mm is better for zooming that the 35 mm. The 50 mm includes an ED lens. What exactly is that? Is it worth the price? What does the 1:1 and 1:2 mean? I'm really looking for something that magnifies and gets really nice focus for close up photography. I just want to make sure a I get a nice quality lens for the price. Thanks for any and all advice! Sorry for so many questions!