Received my new lens several days ago, I was so busy recently, and didn't test it until yesterday. I took some pictures yesterday using 20D+300/2.8IS+monopod. I felt this combo was very light after using 500mm for a long time. Because it's a testing, I used f2.8 all time. a chick of cattle egret a snowy egret a cattle egret was approaching his nest after watching me for a long time. still watching me.