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A The Shooting Menu
ISO sensitivity can also be adjusted from the shooting menu.
Choose
ISO sensitivity settings to adjust settings for viewfinder and live view
photography (0290) and Movie settings > Movie ISO sensitivity
settings to adjust settings for movie live view (064).
A ISO Sensitivity
The higher the ISO sensitivity, the less light needed to make an
exposure, allowing faster shutter speeds or smaller apertures, but the
more likely the image is to be affected by noise (randomly-spaced
bright pixels, fog, or lines).
Noise is particularly likely at settings
between Hi 0.3 and Hi 2.
A Hi 0.3–Hi 2
The settings Hi 0.3 through Hi 2 correspond to ISO sensitivities
0.3–2 EV over ISO 12800 (ISO 16000–51200 equivalent).
A Lo 0.3–Lo 1
The settings Lo 0.3 through Lo 1 correspond to ISO sensitivities
0.3–1 EV below ISO 64 (ISO 50–32 equivalent).
Use for larger apertures
when lighting is bright.
Contrast is slightly higher than normal; in most
cases, ISO sensitivities of ISO 64 or above are recommended.
A See Also
For information on choosing the ISO sensitivity step size, see Custom
Setting b1 (ISO sensitivity step value; 0 315).
For information on
displaying ISO sensitivity in the control panel or adjusting ISO
sensitivity without using the S button, see Custom Setting d8 (ISO
display and adjustment; 0 325).
For information on using the High
ISO NR option in the shooting menu to reduce noise at high ISO
sensitivities, see page 299.