If extant information weere the criteria for comparison then 60Mp would be the equivalent,
But grain is the issue. Grain is caused by the aperture effect -- the open holes acting like tiny pinhole lenses, creating circles on the finished print. That's grain. It doesn't happen in digital, because it can't. Hence the trade-off between the two: Less detail than film but contrastier edges. It's that perceived print clarity, even though detail may be missing, that allows digital to "equal" film. Here "equal" means the perception of the viewer. The net is that you can equal or better 35mm (color neg & reversal film) to 20x30 with 6Mp. (I've seen the results. It does.) 14Mp comes close to equalling 6x4.5. 20Mp certainly will. My 2c, Collin
