Re: EIR EI.

[Gary Beasley <beasleyglb@xxxxxxxxxxxxxx>]

At 09:16 AM 12/3/97 +1000, you wrote:
>
>
>     Hi Folks,
>
>     After running 3 rolls of EIR through in the last month or so, I have
>     come to the conclusion that I have no idea of the best EI. I tried one
>     roll on EI250 and the other two on a mix of 250,320 and 400. It seems
>     that even 1/3 to 1/2 of a stop in overexposure causes a complete loss
>     of colour saturation, especially in the sky.
>
>     The only thing that I can think of is that maybe (slight lack of
>     general knowledge on atmospheric spectral data here), in my part of
>     the world, the background IR is greater than in Rochester. Can the
>     ambient light be low, but ambient IR be high ?
>
>     I usually end up getting about 1/2 the roll being decent shots with
>     good saturated colours, the others are just magenta/pink and white.
>
>     Any idea ?
>
>
Sounds to me like you are shooting without the yellow filter over the lens.
Gary Beasley
beasleyglb@xxxxxxxxxxxxxx
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End of Infrared-Digest V0 #316
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