Sony DSC-H20 - Manual (Page 45)

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ISO
Adjusts the luminous sensitivity.
1 Set the mode dial to (Manual Exposure Shooting) or (Program Auto).
2 MENU t (ISO) t desired mode
• ISO settings other than [ISO AUTO], [ISO 80] to [ISO 800] cannot be selected when the recording mode
is set to Burst or Exposure Bracket mode, or when [DRO] is set to [DRO plus].
(Auto) Sets the ISO sensitivity automatically.
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You can reduce image blurring in dark locations or moving subjects
by increasing ISO sensitivity (select a larger number).
Note
z Adjusting ISO Sensitivity (Recommended Exposure
Index)
ISO sensitivity is a speed rating for recording media that incorporates an image sensor that
receives light. Even when the exposure is the same, images differ depending on the ISO
sensitivity.
High ISO sensitivity
Records a bright image even in dark locations while increasing
shutter speed to reduce blur.
However, the image tends to become noisy.
Low ISO sensitivity
Records a smoother image.
However, when the exposure is insufficient, the image may become
darker.