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  1. #1

    Join Date
    Sep 2002
    Location
    Southern California
    Posts
    8
    In Ansel Adams book 'The Negative', he goes into a bit if detail regarding the advantages of pre-exposing both black and white and transparency film, primarily where increased shadow detail is neccessary.
    He mentions the possible use of a color compensating filter sandwiched between two opaque sheets of plastic when pre-exposing color transparency film. The object would be two-fold: Open up the shadows a touch, and reduce the bluish cast of shadows caused by illumination from the sky.
    What # color compensating filter(s) are we going to use for this, and can anyone be specific about the type, thickness, and opacity of the plexiglass he mentions?

  2. #2
    b.e.wilson's Avatar
    Join Date
    Sep 2002
    Location
    Provo, Utah
    Shooter
    4x5 Format
    Posts
    141
    I guess no one does this. I think I did once. While loading some exposed film onto the developing tank reels, the red heater lamp on my Jobo came on, and I realized then that I'd forgotten to cover it. I had some shots on that reel that should have had some deep blue shadows (Velvia in shade), but the shots came out rather nicely. I never went back to test my impromptu heater-lamp-post-exposure-burner, but I haven't been worrying about covering that lamp anymore.






 

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