Hi everyone,
I came across this table in the English (UK) Photo Technique magazine. I
know it's offending copyright, but I hope to get away with it :) These are
supposed to be recommended figures to compensate for reciprocity failure.
NR means 'not recommended' and the compensation is given in stops. e.g. +
0.33 means plus one third stop. The table also gave recommended filters
to compensate for the change in colour, but as most people don't have a
comprehensive set of filters I've not included that information.
FILM
< 1 sec 1 sec 10 sec 100 sec
Ektachrome 64 nil +0.5 NR NR
Ektachrome 100 nil +0.5 NR NR
Kodachrome 64 nil + 1 NR NR
< 1 sec 1 sec 10 sec 60 sec
Kodachrome E100SW nil nil nil +0.33
< 1sec 4 sec 16 sec 64 sec
Velvia nil + 0.33 + 0.66 NR
< 16sec 34 sec 120 sec 480 sec
Provia nil + 0.5 + 1 NR
< 32 sec 64 sec 120 sec 480 sec
Astia nil + 0.33 + 0.5 NR
< 1 sec 1 sec 10 sec 60 sec
Agfa RSX50 nil nil + 0.66 + 1
< 1 sec 1 sec 10 sec 100 sec
Agfa Scala nil + 0.5 + 1 + 2
< 1 sec 1 sec 10 sec 35 sec
Ilford FP4 plus nil nil + 1.66 +2.5
I hope some of you find this useful, no guarantees are offered against
typos or for the veracity of the data. What I find interesting is the wide
variation in these films. Does anyone have some similar info about colour
print film?
__
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