Week 1 Notes

Week 1 Notes - Film Sensitometry 07:02:00 ← What is...

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Unformatted text preview: Film Sensitometry 10/03/2008 07:02:00 ← What is Sensitometry? • Measurement of the properties of photographic emulsions by examination of the relationship between photographic density and exposure under controlled conditions of exposure and processing. ← ← Why Learn Senstometry? • Provides all the characteristics of a film o Determine the exposure latitude of film o Determine what kind of film you have Normal-Contrast film Continuous-Tone Film Copy Film Line-Copy Film o Film Speed • Help in determining the accuracy of your own camera ← ← What do we need to do Film Sensitometry? • Film • Step Tablet or Gray Scale • Sensitometer (or camera) • Densitometer • Excel (or graphing paper) • French Curve (if you are plotting by hand) ← ← Sensitometers ← ← ← Step Tablet ← • Serves as the subject for the sensitometer • Its purpose is to convert on single level of light into a graduated series of illuminances on the film • Standard step tablet will range in density from 0.1 to 3.1 o 11 step tablet: steps of 0.3 increments (one stop change in exposure) o 21 step tablet: steps of 0.15 increments (half stop change in exposure) ← ← What is a sensitometer? • An instrument that gives a photographic emulsion a graduated series of exposures to light of controlled spectral quality, intensity, and duration.exposures to light of controlled spectral quality, intensity, and duration....
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Week 1 Notes - Film Sensitometry 07:02:00 ← What is...

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