i get great 4x5 negatives on fomapan 100/arista edu @ 50 ASA and developed 10-12 minutes in pyrocat at 1:1:100. most of my exposures go beyond a second, and i found here on apug some times for reciprocity failures from Murray@uptowngallery and simply compiled them in a handy pdf that so far hasn't failed me. http://consumptive.org/2011/04/03/fo...zchild-effect/