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  1. #1

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    darkroom meter calibration

    hello friends! how many people have calibrated the meter with the skin tone???

    my jobo comparator 2 due seems to be not reliable if i should calibrate it with the skin tone...


    thanks

  2. #2

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    The meter should just provide a print exposure that replicates the density of the tone you calibrated it to. Be aware that any image has a range of skin tones - the shadowed side, the highlight side, the near-specular reflection from the forehead. Nonetheless the meter should replicate the exact tone that you calibrated - to the same paper and batch that you used for calibration of course.

    Bob H
    "Why is there always a better way?"

  3. #3
    Nicholas Lindan's Avatar
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    A 'Skin Tone' is the hardest tone to pick for calibration: As Bob has pointed out, there are many, many 'skin tones'; as many tones as there are ways to light skin. You may as well calibrate to a 'rock tone'.

    The proverbial 'skin tone' - 40% reflectance or so - applies to a Caucasian palm in diffuse illumination. Hardly a common, or interesting, subject.

    You need to calibrate your meter to a range of tones and then pick the appropriate tone for the image you are printing.
    DARKROOM AUTOMATION
    f-Stop Timers - Enlarging Meters
    http://www.darkroomautomation.com/da-main.htm

  4. #4
    Nicholas Lindan's Avatar
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    Quote Originally Posted by BobNewYork View Post
    Why is there always a better way?
    There are an infinite number of wrong ways and only one true way; the chances that you are on the one true way are infinitesimally small.
    DARKROOM AUTOMATION
    f-Stop Timers - Enlarging Meters
    http://www.darkroomautomation.com/da-main.htm

  5. #5

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    the thinnest negative part(black) for example seem to be the most reliable value...i think...

    the skin tone is much more difficult...



 

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