Summary: Okay first lets say the mac daddy is the 70-200n 2.8. But if you have less money than some. This len is not going to let you down. Its sharp and detailed through out. Yes its better at 15 to 30 feet. But every lens has a sweet spot. This len is in my bag no matter what or where Im going.
Excerpt: This lens is a joy to own and use for pulling that distant object in for a closer view. The auto focus and the image stabilization are both excellent. I read some talk about lens creep (meaning that if you point the camera up or down the lens might change zoom settings due to it's own weight), but that has not happened to me yet. Maybe it will when it gets a little older.
Pros: Durable, Easily Interchangeable, Fast / accurate auto-focus, Strong Construction