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I'm trying to determine reciprocity failure for Fuji Pro 160 NS, but Fuji's datasheets are not as informative on it as I'd like them to be.
Instead of the usual graphs they only have this table afaict.
How am I meant to interpret this for longer exposures of 10, 30 or even 60s?
A third of a stop for anything over 4 seconds, third of a stop for every 4 seconds or just don't do it because it'll be fucked?