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Exposure  Latitude
Figure  2-8Using  a  gamma  gauge

Photography (Advanced) - Advanced manual for photography and other graphic techniques
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Figure  2-7.—Computing  Gamma. The values of D1, D2, log H1, and log H2 are read Quick  method—This  method  uses  a  gamma directly   from   the   graph.   The   mathematical gauge (fig. 2-8). The arrow of the gauge is placed on computation for this method is shown at the top of the straight-line section of the curve with its base line figure  2-7. parallel to the log-H axis. Gamma is indicated where 2-14







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