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Photography (Advanced) - Advanced manual for photography and other graphic techniques | Next
Figure 2-8—Using a gamma gauge |
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
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