Re: Fiddling with odd filters for EIR

[boblong@xxxxxxxxxxx (Robert Long)]

On Mon, 11 Aug 1997 18:49:16 +0000, you wrote:

|I recently obtained a Kodak Filter handbook for technical and=20
|scientific use. The transmission plots triggered some thoughts about=20
|alternative filter use with Ektachrome IR

An old-fashioned technique for "harmonizing" colors in painting is to
give the whole picture a color wash--similar to introducing a
deliberate "color cast" in photoshop.  When (a good many years ago) I
experimented with different filters, I felt that the difference
between the Wratten 12 and, say, an orange filter was like introducing
a color cast because it lowered the blue content of the final image.
Carry this too far, and you're moving in the direction of a monochrome
red image.  Might as well use HIE and print with red ink only.  I
found those extreme images very uninteresting.

If you're not careful, however, that clear, pure colors you get with a
Wratten 12 can look rather garrish--rather in need of "harmonizing,"
in fact.  But no matter what effect you're after, there is no
substitute for using the materials until you can take a reasonably
good shot at visualizing the effect before you make the exposure.
Otherwise you're depending on dumb luck and hoping...

Bob Long
(boblong@xxxxxxxxxxx)
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End of Infrared-Digest V0 #186
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