We had no solution, unfortunately, for the final line's 'cem', meaning 100, which also sounds like 'sem', without.
400 ASA is 'fast' film, used in low-light conditions; now called ISO.
Sarah Maguire, Workshop Facilitator
Notes on the literal translation:
dual meaning - revelação = develop or revelation
wordplay - cem=100 or sem = without
Francisco Vilhena, Literal Translator