I have an F4s on the way, and, before buying, I had thought I had gone through all of the features that would be relevant to me. I just read that the viewfinder LCD readout is in half-stops only. When using my F3, the camera is clearly sensitive to 1/3 stops, as I can tell when turning the aperture ring to where these would be (and seeing the -/+ indication in the finder). How would this compare to the F4s' half-stop only readout? From what I can remember the N90s shows 1/3 increments in its LCD. Is this correct?