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[OM] Reciprocity table

Subject: [OM] Reciprocity table
From: "Ian M. Stewart" <ims@xxxxxxxxxxxxxxxxxxx>
Date: Tue, 10 Feb 1998 12:09:56
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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