Mills, Frederick Wm. (Frederick William) · London : Dawbarn & Ward · leaf 35
PHOTOGRAPHY. 23 desired may, be seen by reference to the table* shewn in Figure 3. … FIG. 3. Exposure as well as the actinic (not the visual) intensity of the light varies not only with the hour of the day, but the month. It is both theoretically and practically impossible for any photographer, however experienced, to more than approximately gauge the correct exposure required to…
