|I came home from work today to find a package from brianlh, containing the 17-40L I bought from him. I went out back to snap a few test shots, and on a whim I grabbed a 12mm extension tube. After playing with the lens in "normal" shooting mode, I attached the extension tube, set the focus to manual and infinity, and shot a couple wide angle macros:
It's neat to be able to get in tight, but still capture that wide view of the background. Unlike the complete blurring that occurs with a long focal length macro lens, the background remains somewhat recognizable. A very different way to shoot macro.
I'm really liking the 17-40. It's excruciatingly sharp when stopped down, a really nice landscape lens.