EIR EI.

[Alan_Arthur_AT_D3Mail%D3Mail@xxxxxxxxxxxx]

     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 ?


     Alan.


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