I've got the D80 with the 18-135mm kit. I've noticed that this set up has a hard time focusing in low/dim light. I've heard this mentioned before with this set up. What is the slow part of the equation? Is it the lens that has a hard time focusing or is it the camera it's self that hard to focus? I found my canon 10D was much better in low light. I'm not sure whether it was the camera or the lens. My main problem is I do a lot of available light sports photography and find the focus problems to be frustrating at best. What's the solution? Can I solve this with a better lens or are USM motors faster than the Nikon equivalent? Thanks for the help.