Hey all, I currently have the Nikon SB-600 flash. It's certainly a very nice flash; but it's kind of big for those times I want to walk around with just a camera and 1-2 lenses. The SB-400 was originally released as "a new flash for the D40" - but is there any reason it wouldn't work well on a larger camera, such as a D300 or a D3 (yeah, like I'm buying one)? Mainly I'm wondering if there are issues with shadows from a longer lens if I'm not bouncing the flash. Thanks!