Chapter 9. Camera Effects
Long exposures bless the photographer with some unique opportunities—the chance to capture random collections of light and motion. We’re used to thinking of light as the source of illumination, but it can also be the subject. Just about anything that produces illumination can be captured after dark.
Extended exposure times also mean you can use a flash unit or other form of portable illumination to manually add light to specific areas in the scene. You can transform the subject matter into a light painting with an electronic flash or even a flashlight, selectively adding light. You can even turn the flashlight around ...
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