Nikon D100 - Manual (Page 61)

49
Taking Photographs—Sensitivity (ISO Equivalency)
The Function Dial
Pictures can only be taken when the function dial is set to P, S, A, or M. When the
function dial set to ISO, the shutter release will be disabled. At settings of QUAL, WB,
and ISO, ISO can not be selected in the shooting menu.
3—ISO Auto ( 148)
When ON is selected for Custom Setting 3 (ISO Auto), the camera will automatically
vary sensitivity from the value selected by the user to help ensure optimum exposure.
Sensitivity can not be set to HI-1 or HI-2 while ISO Auto is on, and ON can not be
selected for ISO Auto is when ISO is set to HI-1 or HI-2. If a flash is used when ISO
Auto is on, ISO will be fixed at the value selected by the user.
The Function Dial
With the function dial set to ISO, rotate the main command dial to cycle
through sensitivity settings as shown below.