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Portable Network Graphic  |  1988-01-08  |  5KB  |  512x342  |  4-bit (4 colors)
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OCR: BREFCEHC Basis of Adams' Zone System <<--- Tonal Range of Black & White Photography --- >> I II II] AI VII VIII IX X Zone O Total black in print. Zone I First step above total black, slight tonality, no texture. Zone II Suggestion of texture. Dark shadows with some detail. Zone III Average dark materials. Zone IV Average dark foliage, dark stone, or landscape shadow. Zone V Middle gray (18% reflectance). Clear north sky, dark skin. Zone VI Caucasian skin in sunlight, light stone, shadows on snow. Zone VII Very light skin, average snow with acute side lighting. Zone VIII Whites with textures, textured snow. Zone XI White without texture. Slight tonality, no texture. Zone Y Pure white of printing paper. Specular glare/light sources.