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ISO speed guide
Low ISO speeds reduce image noise but may increase the risk of camera/subject shake
or reduce the area in focus (shallower depth of field), in some shooting conditions.
High ISO speeds enable low-light shooting, a larger area in focus (deeper depth of field),
and longer flash range but may increase image noise.
Note
Can also be set on the [ISO speed] screen in [ : ISO speed settings].
To add [H] (equivalent to ISO 25600) as an available option, set [ISO expansion]
to [1:Enable] in [ : Custom Functions(C.Fn)] ( ).
Caution
Setting [ : Highlight tone priority] to [Enable] or [Enhanced] will prevent you
from selecting ISO 100/125/160 or [H] (equivalent to ISO 25600) ( ).
Shooting in high temperatures may result in images that look grainier. Long
exposures may also cause irregular colors in the image.
Image noise (such as dots of light or banding) or irregular colors may be noticeable
at high ISO speeds.
Overexposure may occur with subjects captured at close range at high ISO
speeds.
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.
Image noise (such as dots of light or banding) and irregular colors may increase
and apparent resolution may decrease at H (equivalent to ISO 25600), which is an
expanded ISO speed.
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