I've seen some discussions about these two's compatibility and the articles have taken a life of their own and never answered the question. So, will this lens work with a D7000? If yes, how slow is the autofocus (asking will it work at football games, both day and night)? I have read about taking your camera with you when you go to buy. But I can't find a place that has this lens. They would have to order for me. I guess it would still work trying it before hand, if it doesn't work I don't have to buy it even if they order it.