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84
Setting the ISO Speed for Still Photos
ISO Speed Guide
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Low ISO speeds reduce image noise but may increase the risk of
camera/subject shake or reduce the area in focus (shallower depth
of eld), in some shooting conditions.
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High ISO speeds enable low-light shooting, a larger area in focus
(deeper depth of eld), and longer ash range but may increase
image noise.
o
As H1 (equivalent to ISO 51200) and H2 (equivalent to ISO 102400)
are expanded ISO speed settings, noise (dots of light, banding, etc.)
and irregular colors will be more noticeable, and the resolution lower
compared with the standard setting.
o
As L (equivalent to ISO 50) is an expanded ISO speed setting, the
dynamic range will be somewhat narrower compared with the standard
setting.
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If [
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3: Highlight tone priority] is set to [Enable] or [Enhanced]
(p.109), L (equivalent to ISO 50), ISO 100/125/160, H1 (equivalent to
ISO 51200), and H2 (equivalent to ISO 102400) cannot be selected.
o
When shooting with a high ISO speed, high temperature, long exposure,
or multiple exposure, image noise (rough grain, dots of light, banding,
etc.), irregular colors, or color shift may become noticeable.
o
When shooting in conditions that produce an extreme amount of noise,
such as a combination of high ISO speed, high temperature, and long
exposure, images may not be recorded properly.
o
If you use a high ISO speed and ash to shoot a close subject,
overexposure may result.
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