I don't have time to test 135 Neopan so I'm reaching out for advice. The last decade at Christmas I have been making an image record of my relatives. Shooting conditions are interior natual light. My favorite film is Tri-X rated at 200 developed in D-76 1:1 or 250 in XTOL. 200 is slow so I've wanted to try Neopan 400 rated at 320 developed in D-76 1:1. Will Neopan have the same rich tonality as Tri-X? To avoid empty shadows what is the recommended film speed?