ISO Sensitivity Settings
G button U1 video recording menu
Adjust the following 

| Option | Description | 
|---|---|
| [Maximum sensitivity] | 
 | 
| [Auto ISO control (mode M)] | 
 | 
| [ISO sensitivity (mode M)] | Choose the ISO sensitivity for mode M from values between ISO 64 and Hi 2.0. | 
Cautions: Auto ISO Sensitivity Control
- At high ISO sensitivities, “noise” (randomly-spaced bright pixels, fog, or lines) may increase.
- At high ISO sensitivities, the camera may have difficulty focusing.
- The foregoing can be prevented by choosing a lower value for [ISO sensitivity settings] > [Maximum sensitivity].