Re: Focus shift (was: Medium format and plastic sheets -Reply

[George L Smyth <GLSmyth@xxxxxxx>]

Timothy E. Coffer wrote:
> 
> I can also jump on the "no focus correction for EIR" bandwagon. I have
> plenty of images taken with an autofocus camera (Nikon 8008s) to prove
> it. And the comment relayed from Kodak that "visible light predominates"
> only confirms my opinion that this film (EIR) is primarily a false-color film.
> Not that I have a problem with that "limitation" at all. One test is to shoot a
> subject of known infrared luminosity with both film. HIE clearly reacts to
> the reflectivity in the IR spectrum, whereas EIR seems more involved
> with shifting the painter's palette around.
> Now what pigment layer in IER's emusion is supposed to be the
> IR-sensitive one again? :=)

The three layers are sensitive to green, red, and infrared (all three
layers are sensitive to blue radiation).  They are dyed blue, green and
red, respectively, so yes, it is a false color film.

george

- -- 
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