RE: konica deveopment - or lack thereof

[hannu.jarventaus@xxxxxxxx]

>From: 	Goff Photography[SMTP:jdgoff@xxxxxxxx]
>Subject: 	Re: konica deveopment - or lack thereof
>
>I haven't looked at the transmission curves for the red 29 filter so
>what follows is generated from my memory---which is increasingly
>unreliable
>as I age. But I believe the cut off for the 29 is further out into the
>red
>end of the spectrum than the 25. You may wish to compare that curve to
>the
>sensitivity of the Konica. The point I driving toward is that by using
>the
>29, you may be reducing the 'light' that is in the sensitivity range of
>and
>impinges upon the film, thereby causing an underexposure.

I have used sometimes three different red filters, B+W 091 (like #29),
Hoya 25A (like #25) and Cokin 003 (like #25 ?) on the same roll
of Konica IR 750. There is no big difference between the negatives
in density. You can look at the filter tables in WJ's homepage.

Hannu
>
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