I'm using a cheap macro technique where you put a 50mm lens (focused to infinity) head first onto a telephoto lens (also focused to infinity). This is shown here: [ame="http://www.youtube.com/watch?v=2F_xfKcxvro"]http://www.youtube.com/watch?v=2F_xfKcxvro[/ame] Anyway, I am having a lot of trouble getting the camera to focus on a whole area. From what I know as a semi-begginer photographer, that this has to do with the f- button or f-stop (I'm not really sure). I have set the f- button on the forward lens to as high as it will go, but the telephoto lens won't allow me to turn the f- button any higher. Is there anything I can do to make the "focus area" bigger? Thanks so much.