Nikon D610 User Manual page 134

When On is selected, the viewfinder and
control panel show ISO-AUTO. When
sensitivity is altered from the value
selected by the user, these indicators
flash and the altered value is shown in
viewfinder.
S
A
Auto ISO Sensitivity Control
Noise (randomly-spaced bright pixels, fog, or lines) is more likely at higher sensitivities. Use
the High ISO NR option in the shooting menu to reduce noise (see page 218). When a flash
is used, the value selected for Minimum shutter speed is ignored in favor of the option
selected for Custom Setting e1 (Flash sync speed, 0 234). Note that ISO sensitivity may be
raised automatically when auto ISO sensitivity control is used in combination with slow sync
flash modes (available with the built-in flash and the optional flash units listed on page 293),
possibly preventing the camera from selecting slow shutter speeds.
A
Turning Auto ISO Sensitivity Control On or Off
You can turn auto ISO sensitivity control on or off by
pressing the W (S) button and rotating the sub-
command dial. ISO-AUTO is displayed when auto ISO
sensitivity control is on.
108
Control panel
W (S) button
Viewfinder
Sub-command
dial