Hello forum members.. I ended up purchasing the Canon 100-400L IS for use with my 60d. I used it at minor league baseball game and took some bird shots, the results were fair and it will take some getting use to. I will post a few in the coming days. Just as I read in some other threads, it takes some getting use too while hand holding, it does not help that I shake occasionally due to a health condition. Im excited to have it and hope it serves me well. Im glad I am a member and have the use of site to read all the good info at my disposal.