I should preface this by saying that I almost never use flash (thanks to the D3's insane ISO performance and because I tend not to shoot things which need flash). Since I've had my D3 I have not once stuck a flash on it. My knowledge of flash is extremely minimal. On the off-chance that I end up choosing to use flash, I have a question. Given that the D3 doesn't have a built-in flash, is it possible to use it as a "controller" even though it doesn't have a built-in flash? If, for instance, I wanted to use the D3 to trigger a speedlight which is somewhere else in the room, would the D3 itself have to have a flash mounted in order to act as a master? Or can it do so without one? Hope this is not a really stupid question, although given my knowledge of flash it could well be Thanks to anyone who can help.