Small-Format Cameras, Continued
Shutters
Camera shutters control both the exact instant film is exposed to light and the
duration of exposure. The two types of camera shutters are the leaf shutter
and the focal-plane shutter.
Leaf shutters
Leaf shutters consist of several blades of spring steel that overlap each other.
Pressing the shutter release button rapidly moves the blades apart or open to
allow light to strike the film. The blades remain open for the duration of the
preset exposure time (shutter speed) before springing shut again. Leaf
shutters may be used with a flash unit at all shutter speeds.
Figure 7-11 illustrates the operation of leaf shutters.
Figure 7-11.—Leaf shutter operation.
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