OK, just a little rant. Never never NEVER drop your lens. I just got the estimate to fix mine from Canon. Story - I dropped my lens about a month ago, straight down, taking it off the body, hard surface (concrete) when I was out photographing the moon I could not get a sharp image. Decided I better send it in, got a quote to start with of 75.00. OK cool. Just got the news 440 dollars. Again, I say NEVER drop your lens, take care of them. Had to get it fixed I use it a lot.