I got the above lens with my d80. Most of the time it seems to work fine. The focus is ok and it's sharp enough for most midrange shots. Problem is when I set it up for a landscape shot it's almost always soft. I'd be shooting wide open 18mm 1/30 at f18. The camera will be on a tripod and I will usually use the self timer and still I have many soft shots this way Any ideas as to what's wrong, is it the lens? Am I doing something?