Nikon D100 Product Manual - Page 160

Menu Guide-Custom Settings Custom Settings Custom Setting 3: ISO Auto If ON is selected for this option, the camera will automatically adjust sensitivity (ISO equivalency) when optimal exposure can not be achieved at current exposure settings. If sensitivity is set to HI-1 (approximately equivalent to ISO 3200) or HI-2 (approximately equivalent to ISO 6400), this option is automatically set to OFF and can not be adjusted. CSM MENU F3 ISO Auto Control OFF OFF OK ON ON Option OFF (default) ON Description Sensitivity remains fixed at value selected by user, regardless of whether optimal exposure can be achieved at current exposure settings. When optimal exposure can not be achieved at the sensitivity selected by the user, sensitivity is adjusted to compensate, to a minimum approximately equivalent to ISO 200 and a maximum approximately equivalent to ISO 1600 ( 76). Sensitivity can not be set to HI-1 or HI-2 while this option is in effect. Bank Select If a shooting menu bank in which ISO has been set to or is chosen after ON is selected for Custom Setting 3 (ISO Auto), sensitivity (ISO equivalency) will NOT be adjusted automatically. Sensitivity will also not be adjusted automatically if a Custom Settings bank in which ON is selected for Custom Setting 3 (ISO Auto) is chosen after ISO has been set to or . ISO Auto If a Speedlight is used when ISO Auto is on, sensitivity (ISO equivalency) will be fixed at the value selected by the user. Noise Noise is more likely to appear in photographs taken at higher sensitivities. 148