I am considering buying a new 70-300mm or longer lens for animal shots (at the cincy zoo). I was wondering if anyone thought it was worth it to pay $300 for nikon's ED glass versus $100 for the normal nikon 70-300 and other brands, which are even less expensive. I think sigma had a great 70-300 macro APO for 190.00. Let me know what you think. Thanks Craig Remember, I am a beginner, not a pro, and my prints are usually 11x 14.