f/stop increments in digital are different than film Really? Not sure I understand this myself. Ya, seems like the CCD runs up against exposure limits at both the high end and at the low end. The dark end is limited by noise, and the high end by blooming. And somewhere in here comes the limitations of the 12 bit (or so) A/D converter. If (?) cameras allow manually setting the white points and black points, it should roughly be equivalent to changing the development time... Once the bits get into photoshop one can adjust Brightness and/or Contrast. I suspect this is roughly equivalent to changing exposure in the enlarger, and using different contrast grades of paper? Maybe together we can figure this all out so it makes sense.