Re: Test on Kodak EIR film

[Michel Wurtz - LTE <mw@xxxxxxxxxxxxxxxxxxx>]

Willem-Jan Markerink wrote:
> 
> On 27 Oct 98 at 11:51, Helmut Faugel TE wrote:
[...snip...]
> > EIR does not need any compensation between 1/1000s und 1/100s, but
> > at 1/10s it needs +1 stop and a CC20B filter according to the
> > data sheet, or in other words it shows a strong color shift at
> > exposure times you do not even think of reciprocity failure.
> 
> CC20B?
> I only know Y(ellow), M(agenta) and C(yan).
> Even if you mean cyan, it would be opposite of what Symon
> expirienced....a red shift at short exposures, or a blue shift on
> short. This is also what made me ponder about adding a strong ND
> filter to decrease the red tones....ie a blue shift because of long
> exposures....

CC20B (blue) There is also CCxxR (red) and CCxxG (green)
Blue is the correct compensation filter for increasing red
on EIR (and that's what the Kodak doc says).  Don't forget that
there is allready a yellow filter, so the blue filter mask red
and green, but not IR, thus increasing the red tones of the image
at low speed.

-- 
Michel Wurtz    ENGEES - Laboratoire Territoires & Environnement
                1, quai Koch - BP 1039, F-67070 STRASBOURG cedex
                Tel: +33 03.88.24.82.45  Fax: +33 03.88.37.04.97
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