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54
Exposure
In addition to the focus and other settings, it is
also important to adjust the exposure in order to
take beautiful pictures.
Exposure is the amount of light that the CCD of
the digital still camera is able to receive. This
value changes according to the combination of
aperture and shutter speed. When the amount of
light is larger, the image becomes brighter
(whitish), and when it is smaller, the image
becomes darker. The proper amount of light is
called “correct exposure.”
The correct exposure can be maintained by
setting a faster shutter speed when the aperture
value is reduced, or a slower shutter speed when
the aperture value is increased from the correct
exposure.
Aperture
Aperture is the opening in the diaphragm of the
lens part which adjusts the amount of light
entering the camera. The aperture setting value
is called the “aperture value (F value).”
Open (smaller F value)
Close (larger F value)
Adjustment by shutter speed
Shutter speed adjusts the time during which
light enters the camera.
Faster
Slower
When setting a slower shutter speed, it is
recommended that you use a tripod to prevent
shaking.
Overexposure
• Open the aperture
• Set a slower shutter speed
Correct exposure
Underexposure
• Close the aperture
• Set a faster shutter speed
• The image tends
toward overexposure
(brighter).
• The in-focus range
narrows.
• The image tends
toward underexposure
(darker).
• The in-focus range
widens.
• The image tends
toward underexposure
(darker).
• Moving objects
appear stopped.
• The image tends
toward overexposure
(brighter).
• Moving objects
appear to flow.
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