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Download PDF by Museum Ludwig Cologne: 20th Century Photography (Klotz)

By Museum Ludwig Cologne

ISBN-10: 3822858676

ISBN-13: 9783822858677

A desirable perception into the photographic selection of the Museum Ludwig, Cologne whic bargains 860 works by way of round three hundred photographers.

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Extra info for 20th Century Photography (Klotz)

Sample text

We will deal with reciprocity failure later in the book. ZONE PLACEMENT 39 THE CHARACTERISTIC CURVE A characteristic curve is a graphical representation of the way various photosensitive materials respond to a light source. The curve shows the way in which density (plotted on the vertical axis) is affected by an increase in exposure (plotted on the horizontal axis). ) The Paper Curve. The paper curve has three distinctive parts—the toe, the shoulder, and the straight line. The toe is the lower portion of the curve and includes Zones X and IX.

Shadow detail is less affected by development than highlights, which are very susceptible to and controlled by changes in development. Therefore, you need to expose for the shadow detail or it will not be in the negative. You determine what part of the scene you want to be Zone III, shadow detail, and take a reflective light meter reading in that tonal area. Then stop down two stops from the meter reading for a correct exposure. When using this method, be sure to choose the area of the scene containing detail (Zone III) that is important to your photograph.

This may not be the brightest light in the environment, but because of the way the film develops and the limits of exposure of the paper it will be reproduced as white. Though the film has greater latitude to capture and develop tone than does the paper, it is the exposure limits of the paper that will determine the tones that appear when the image is printed. The tonal exposure range of the paper is the controlling factor for the system. This is the amount of exposure the paper will accept from the negative; any value variations below Dmin or above Dmax will not be seen The printing of the paper can only happen within specific limits.

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20th Century Photography (Klotz) by Museum Ludwig Cologne


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