I've looked under some different permutations and haven't seen any answers yet. How accurate are the rated film speeds for the Portra (NC and VC 160 and 400) and Fuji 160C? I ask because I want to try my hand at color flash photography and need to make sure my meter is telling me the right exposure. In b/w I could do a film speed test and figure this out for myself, but I'll be having my lab soup the C41 for me. Thanks!