Anyone have any eperience with this lens? I have a VERY small budget right now, and while I know I should save up to get a decent lens down the road, I really need a somewhat decent lens for this summer. Here is the lens http://www.adorama.com/CA80200AF2U.html Right now I only have the 18-55 kit lens for my 20D, and need something with more zoom. (I feel severely limitied by the 18-55's lack of a longer zoom, since I usually cant get too close to my subjects, which are usually small animals). I dont need some super-telephoto lens right now, just something better than the 18-55. Are the optics on this lens decent? I am pretty new to photography, so I am not going to go nuts over having the absolute best picture quality right now. I plan on getting a better lens down the road, but I need something cheap to just get me through the summer.