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

Control panel

Viewfinder

 

 

viewfinder.

 

 

S

AAuto 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.

ATurning 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-AUTOis displayed when auto ISO sensitivity control is on.

W(S) button Sub-command dial

108