Ilford's reciprocity failure chart for fp4+ stops at 30 seconds. My exposures are running around 15 min rating fp4+ at 100.
When I shoot color (Fuji NPS 160) I rate the film at 100 and double the exposure time--my negs are awesome.
Thinking that I wasn't compensating enough, I rated FP4+ at 80 and then doubled the time.
I'm still getting thin negs. Suggestions? Anyone have an extended reciprocity failure chart fo rfp4+?
p.s. I'm about to do a test with pre exposure to try and fill in the shadows. Ansel says zone 2. I'm starting at Z 1. My thought is that if I pre expose too much then I'll have an effect that looks kind've like fogged film. Since I'm shooting at night and there's a lot of area hanging around Z 2, I don't want to pre-expose around Z 2 because it'll look fake. Am I thinking correctly?