I've been thinking about doing a series of test shoots to try different films in different devs but I can't really decide how to do it. I got PanF+, APX100 and TriX (and some Fomapan100 coming in soon to replace the APX). For developers, I got PMK, Rodinal, Diafine and some Perceptol in the photo club darkroom. I know Diafine increases the apparent film speed about one to two stops while PMK and Perceptol are speed decreasing developers, downrating film speed 1-1.5 stops.
I read Kaiyen's
blog article about determining EI but can you just leave out the dev time variable like that? I agree about finding the shadow exposure but I would have thought you should develop each frame for correct highlights at that specific exposure? Then I found this APUG post
which I gather is about the same thing as Kaiyen's method, although Michel is using a generic motif and a slightly more advanced method of determining the zones. He then adjusts the dev-time after examining the roll. I feel I'm missing something here...
I know I should settle for one or two combinations to simplify the process but which ones? How do you guys go about testing a new film?