Hi I have a d300 with the usual 18-200 VR lens. I am shooting at wide angle (18mm?) -- without the lens out of its position at all -- and getting the full visible scenery in viewfinder. But in these cases, there is still some focus somewhere, a tree, or a rock, or something, and the rest is blurred. This effect is great when I wish to focus on something, but it's a big disappointment when I come home and see an entire mountain or lake completely blurred with one stupid tree in focus. I know I am missing something here. I use my camera in the shutter "S" mode, because this helps me most with low lighting (I do a lot of night photography). Should I be shifting to aperture "A" mode instead, and setting "f" at something like "f22" so that the widest possible area is in focus? This is what I have gathered from reading some websites and the "Understanding Exposure" book, but I'm not sure. Also, when I have "A" mode and I am selecting aperture, how should I set manually the shutter speed? Or will I have to let D300 select the shutter speed automatically? Thanks!