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In picture 25, page 21, we have an entirely different effect, but caused again by atmospheric conditions. A great fog bank is coming up out of the sea, and just before it has completely killed the glare of the sun, but while light is being reflected from the upper clouds, the photographer has made his picture. To show the great difference between the strength of the light and that in subject number 2G, the exposure in this picture was at one twenty -fifth of a second with a G.3 stop and no filter.
This taking advantage of atmospheric conditions as they occur is again illustrated in Scene 22, page 22. Because of the smoke from distant forest fires the photographer has used the sun directly overhead as at high noon, and by stepping back into the shadows has gained his desired pictorial effect.
The use of a very strong sun spot is well exemplified in the picture entitled "The Trail in the Timber," (Scene 21, Page 22). The cameraman has his camera well shaded by the dense trees and has snapped his picture just as the entire pack train entered the sun spot. In this manner he has been able to avoid the dust and has used the dust cloud to the betterment of the subject by heightening the action of the scene. At the same time this picture illustrates the cool depth of the forest contrasted with the heat of the open trail.
In the open timber where the heavy glare of the sun is greatly subdued by the presence of much green foliage it is often advisable to make the picture by exposing only for the shadows, allowing the high lights to take care of themselves. In this manner beautiful effects can be obtained, such as shown in Scenes IT and 18, on page 21.
Although startling effects may be obtained by all methods, when we come to night photography, direct lighting is preferable to back lighting. This may be explained by the fact that the source of the light is usually so small that the surrounding shadows are able to get in their helpful work no matter from which direction the light is coming. You will notice in Scene 28, page 25, a motion picture troupe is working about a campfire on a night location. Using all the electricity being gen