since this year i shoot film, and i knew that film have a bigger dynamic range (i.e.: it can capture scene with more contrast than any digityal sensor can do.).
But until i tried shooting film in bad condition (in the street at 4 pm, almost no light, and two of my friends tempting each other for a kiss (and maybe more
).
i used a 400 iso film that i underexposed for 1.5 speed, with a 50mm f1.7 @1.7, 1/40.
the film was developped at 400 iso, and it seems that it wasn't underexpose at all !
Sensor can't do that, that's why we use highier iso more often, just to be able to get those shoots, in some very exceptional sitaution, once in a month