It wouldn't fit a D200 with a 70-200 mounted. It will protuded out. only long enough for the lens without the body. Guess only Lowepro Toploader 75AW can fit D200 with 70-200 mounted.
Even if can fit into the bag when mounted, i dun think tats a very good thing to do..u r adding stress to the lens mount and the entire length of the lens oso have to take the weight of ur body or vice versa..:think: