Originally Posted by
xpatUSA
There is a way to determine a "level of subtlety" for digital. In the case of the example 8-bit image by Newton, first convert Dan's 2,8,4 to luminosity. It comes to about 6/255. Then go to a graph like this one from DPR:
There we see that 6/255 is equivalent to about -5 EV (depending on camera model) relative to mid-gray (Zone V). That puts us firmly in Zone I, or even Zone 0, as already claimed earlier. Since Zone I has no texture, there is no "subtlety" to be seen, QED.