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  1. #1
    Stephen Benskin's Avatar
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    Sensitometry Theory - Links to useful materials

    Bill Burke has kindly posted a number of the papers all in one place http://beefalobill.com/benskin/. These include:

    Allen Stimson, An interpretation of Current Exposure Meter Technology
    D. Connelly, Calibration Levels of Film and Exposure Devices
    C.J. Niederpruem, C.N. Nelson, and J.A.C Yule, Contrast Index
    Defining K, compiled by Stephen Benskin
    B.E. Bayer, J.L. Simonds, and F.C. Williams, Description of D-log E Curves by Specifically Chosen Parameters
    G.S. Allbright, Emulsion Speed Rating Systems
    J. F. Scudder, C.N Nelson, Allen Stimson, Re-evaluation of Factors Affecting Manual or Automatic Control of Camera Exposure
    C.N. Nelson and J.L. Simonds, Simple Methods for Approximating the Fractional Gradient Speeds of Photographic Materials
    H.N. Todd and R.D. Zakia, Tutorial: A Review of Speed Methods
    C.N. Nelson, Safety Factors in Camera Exposures
    Last edited by Stephen Benskin; 04-06-2015 at 07:56 PM. Click to view previous post history.

  2. #2
    chriscrawfordphoto's Avatar
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    Cool! Thanks for this
    Chris Crawford
    Fine Art Photography of Indiana and other places no one else photographs.

    http://www.chriscrawfordphoto.com

    My Tested Developing Times with the films and developers I use

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    Fort Wayne, Indiana

  3. #3

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    interesting papers, many thanks for the link!

  4. #4
    Stephen Benskin's Avatar
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    Quote Originally Posted by superpos View Post
    interesting papers, many thanks for the link!
    A couple of the papers are seminal. Safety Factors and Simple Methods for Approx. Fractional Gradient lead to the 1960s black and white film speed standard. Contrast Index introduced contrast index. Interpretation of Current Exposure Meter Technology and Re-evaluation of Factors Affecting Manual or Automatic Control of Camera Exposure preceded the 1971 exposure meter standard. Calibration Levels of Film and Exposure Devices explains the relationship between metered exposure and film speed.

  5. #5
    ic-racer's Avatar
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    A good project for someone would be to paraphrase the seminal papers to make the info more accessible to the average APUG user. I know there are book chapters that pull the info together, but posting book chapters could violate copyright laws.

    Photography is a unique expression that straddles art and science. A painter does not need to know the chemical composition of the paint, but a photographer needs to know the physics behind exposure and development. Understanding exposure and development is the difference between a snapshooter and someone in control of their work.

  6. #6
    K-G
    K-G is online now
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    Quote Originally Posted by superpos View Post
    interesting papers, many thanks for the link!
    +1

    Karl-Gustaf
    Karl-Gustaf Hellqvist

    www.heliochroma.com

  7. #7
    fotch's Avatar
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    TY
    Items for sale or trade at www.Camera35.com

  8. #8
    Stephen Benskin's Avatar
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    Quote Originally Posted by ic-racer View Post
    A good project for someone would be to paraphrase the seminal papers to make the info more accessible to the average APUG user. I know there are book chapters that pull the info together.
    Wouldn't diluting the information eliminate the whole purpose of having source material?
    Last edited by Stephen Benskin; 04-07-2015 at 10:01 PM. Click to view previous post history.

  9. #9
    MattKing's Avatar
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    Thanks for the better thread title
    Last edited by MattKing; 04-07-2015 at 07:11 PM. Click to view previous post history.
    Matt

    “Photography is a complex and fluid medium, and its many factors are not applied in simple sequence. Rather, the process may be likened to the art of the juggler in keeping many balls in the air at one time!”

    Ansel Adams, from the introduction to The Negative - The New Ansel Adams Photography Series / Book 2

  10. #10
    Bill Burk's Avatar
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    Happy to provide a home for these important papers. They're all Stephen's collection, so he deserves the thanks.

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