I have a very noobish question about metering with the AE-1 Program. Say for example i want to use an aperture of f/11, or any other f-stop, do i just keep selecting a film speed until the f/11 icon, or watever f-stop i chose, lights up inside the viewfinder? or is there an other way. also, what is meant by adding or subtracting an f-stop? in adding an f-stop do i choose the next f-stop with a smaller or larger number? and wen subtracting do i do something similar? UPDATE: i read the manual, but still couldn't figure it out.