Hi, After reading bunch of forums and reviews I decided to give a try to Canon EF-70-300 f/4.5-5.6 IS USM. A lot of people were saying to get the "L" series that is 70-200 f/2.8 IS USM L for better colors and sharpness. Anyways, I would really appreciate if you can tell me how I did? and what do I need to do to improve. "I am a Newbiee" I have over 1000 pics that I took today from Lincoln Park Zoo, Chicago. I am posting some and will post some later. One thing that I had a lot of problem was with Shutter Priority, I Know it takes experience and trial and error to get the right pic, but I was getting them too dark and had a lot of problems. It was sunny and little cloudy so I tried everything. I even set my ISO to max but still. Most of these pics are with ISO at 800. The Gear I have is Canon 450D (XSI) and Lens was 70-300f/4.5-5.6 IS USM..." Let me know if I should keep this or try others" Thanks plz comment.