I was wondering if anyone has investigated the results of reciprocity on the tonal curve. Say I read a Zone V exposure (middle of the range) at 1 min. Reciprocity corrected, it might be 4 min. (Just making up numbers here, they're not important.) Now, Zone II is going to be 3 stops further up along the reciprocity curve (the 8 min point), meaning there likely won't be any density there on the film. Zone VIII on the other hand, is way down in terms of reciprocity (at the 1/8 point, likely not even affected), and will likely end up blocked. So I surmise there's both an exposure shift and a folding of the reciprocity curve into the tonal curve. Any thoughts on this? Am I correct here? Anyone using it to good effect?