Kodak Education Photographic Sensitometry workbook

Kodak Education Photographic Sensitometry workbook - Basic...

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©Eastman Kodak Company, 2006 November 2006 H-740 A SELF-TEACHING GUIDE Basic Photographic Sensitometry Workbook How to Use This Publication Basic Photographic Sensitometry Workbook was prepared by Eastman kodak Company for individual use on a self-study basis. This publication was written in a programmed instruction format, which will allow you to study and learn on your own and at your own pace. You will first read a paragraph or two and then answer some questions in the spaces provided. Immediately afterward, check you answers to make sure they are correct. (All correct answers are provided at the back of the book.) If your answer is correct, go right on to the next question. If your answer is incorrect, reread the material and correct your answer before going on. If you will be studying this material within a regular school program, read only those pages assigned by your instructor. If you are studying on your own, read only those pages assigned by your instructor. Please go to page 2 and begin the program. A WORD ABOUT SENSITOMETRY. .. Sensitometry is the science of measuring the sensitivity of photographic materials. As a photographer, graphic arts cameraman, cinematographer, or other user of photographic materials, you will use sensitometry in the control of operations involving exposing and processing photographic materials. Photographic manufacturers also use sensitometric methods in the control of manufacturing process. Table of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Names of Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Densitometers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Characteristic Curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Why Logs? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 The Parts of a Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Sensitometers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Step Tablets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figuring Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Constructing the Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 D-min. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 D-max . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Gamma . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Contrast Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Average Gradient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Film Speed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Standard Film-Speed Tables . . . . . . . . . . . . . . . . . . . . . . . .11 Family of Curves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Exposure Latitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Color Negative Sensitometry . . . . . . . . . . . . . . . . . . . . . . 14 Reversal film Sensitometry . . . . . . . . . . . . . . . . . . . . . . . . 15 Paper Sensitometry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Appendix A-Logarithms . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Bar Logs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Using a Table of Logarithms . . . . . . . . . . . . . . . . . . . . . 18 Antilogs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Appendix B-Slope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 Glossary of Equivalent Terms and Preferred Terms . . 21 Answers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Acknowledgements This completely revised edition of Basic Photographic Sensitometry Workbook is the result of the efforts of many talented people. The basic concept and much of the text were contributed by John Bell, a senior at Rochester Institute of Technology, Rochester, New York. W. Arthur Young, Senior Editor, Consumer/Professional & Finishing Markets, Eastman Kodak Company, provided guidance and many valuable suggestions. Several important technical details were added by Kodak's sensitometry authorities, who are preeminent in the field. It is our hope that the contributions of these people will be as valuable to you, the reader, as they have been to us in the preparation of this booklet.
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This note was uploaded on 10/05/2010 for the course ARTM 360 taught by Professor Wentworth during the Fall '09 term at CofC.

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Kodak Education Photographic Sensitometry workbook - Basic...

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