@ Trask: of course Olympus XA, use your TechPan stock, in my opinion it's one of the most interesting films ever made.
@ georg16nik: yes, Copex is panchromatic. Sorry for that. I thought I once had seen a graph were the sensitivity above 600 nm goes down very fast.
Maybe 4 o'clock a.m. is not the best time for recalling facts.