I bought the lens a week ago very favorable. In various forums or reviews, the 75-300 not fared particularly well. After I tested it extensively on my 40D and 10D, I can hardly understand the criticism of this lens. Sure you need good light and higher ISO, but the images are sharp crack. The AF is quick and relatively quiet. There are other, Sigma, Tamron, which are much louder. I am surprised and very pleased that this lens does. Apart from the lack of IS, it is a class member. For the budget conscious an absolute buy recommendation. Michael Schulz Ps .: lens hood is mandatory to exploit the power. (Although costs extra, but worth it)