Stephen - this is very important and relates to some of my recent questions in the ISO thread. Is it worth starting a thread specifically on the intervals "below metered" for ISO and ZS? Or should we discuss it in the ISO thread? Just want to make sure things don't end up too disorganized. I can PM you if it makes more sense. Don't want to sidetrack Bill's thread.
Sure. Although I really got into this in the thread What is the Relationship Between Film Speed and Camera Exposure.