I shot these with my 40D and a 17-40mm L. And though they are not water proof... they have held up well in the rain on a number of occasions so far, but I wasn't in the rain just quite yet. If you know what you are doing you can usually stay out of the rain. I want a 10-22 but I have seen pictures and I'm not so sure it is as sharp as I want it. I see you have one. I'm very particular about sharpness and I'm not about to put down 700+ for a somewhat soft lens. Do you like yours?