You can technically (depending on film) fix a 2 stop underexposure - e.g. with Tri-X there's no problem pushing it to EI 1600. But you can't really do it on a p

You can technically (depending on film) fix a 2 stop underexposure - e.g. with Tri-X there's no problem pushing it to EI 1600. But you can't really do it on a picture-by-picture basis, only for a whole roll.