Well, I've begun to use this developer in earnest for about a month now with two films, TMax 100 and Pan F+. I would say that the results with TMax are excellent, and simply phenomenal with Pan F+. If only Ilford made that film in 4x5 sheets!(posted 8801 days ago)Anyway, my question. I had previously calibrated a system using Rodinal 1:50 with these films (with excellent results), where I altered both film speed and development time in order to manage the contrast in the scene being photographed. For example, with TMax100 (in sheets), I would vary the film speed between EI 32 - 160, to go from N-2 to N+2. So, my question ; what are others' experience of altering EI & development in this manner with PMK? If I alter the amount of sodium metaborate (maybe less for N-, and maybe more for N+, will this enable me to manage difficult contrast conditions in a reliable and consistent manner? Alternatively, is it worthwhile to use Amidol to increase film speed, particularly where you want to go N+ ? Interestingly, there seems to be a distinct correlation between PMK dev times, and those for Rodinal 1:50, and I suppose another way to word my question is whether both developers invoke a similar effective speed out of films.