Nikon D7100 Product Manual - Page 109

Auto ISO Sensitivity Control (P,S,A,andMModesOnly) If On is selected for ISO sensitivity settings > Auto ISO sensitivity control in the shooting menu, ISO sensitivity will automatically be adjusted if optimal exposure can not be achieved at the value selected by the user (ISO sensitivity is adjusted appropriately when the flash is used). 1 Select Auto ISO sensitivity control for ISO sensitivity settings in the shooting menu. To display the menus, press the G button. Select ISO sensitivity settings in the shooting menu, highlight Auto ISO G button sensitivity control and press 2. 2 Select On. Highlight On and press J (if Off is selected, ISO sensitivity will remain fixed at the value selected by the user). S 3 Adjust settings. The maximum value for auto ISO sensitivity can be selected using Maximum sensitivity (the minimum value for auto ISO sensitivity is automatically set to ISO 100; note that if the ISO sensitivity selected by the user is higher than that chosen for Maximum sensitivity, the value selected by the user will be used instead). In modes P and A, sensitivity will only be adjusted if underexposure would result at the shutter speed selected for Minimum shutter speed (1/4000-1 s, or Auto; in modes S and M, ISO sensitivity will be adjusted for optimal exposure at the shutter speed selected by the user). If Auto (available only with CPU lenses; equivalent to 1/30 s when a non-CPU lens is used) is selected, the camera will choose the minimum shutter speed based on the focal length of the lens (auto shutter-speed selection can be fine-tuned by highlighting Auto and pressing 2; for example, even faster values than those usually selected automatically by the camera can be used with telephoto lenses to reduce blur). Shutter speeds slower than the minimum value may be used if optimum exposure can not be achieved at the ISO sensitivity value selected for Maximum sensitivity. Press J to exit when settings are complete. 81