Nikon D5100, 25478 ISO Sensitivity, Display ISO sensitivity options, Choose an ISO sensitivity

ISO Sensitivity

“ISO sensitivity” is the digital equivalent of film speed. The higher the ISO sensitivity, the less light needed to make an exposure, allowing higher shutter speeds or smaller apertures, but the more likely the image is to be affected by noise (randomly-spaced bright pixels, fog, or lines; noise is particularly likely at settings of Hi 0.3–Hi 2).

Choosing Auto allows the camera to set ISO sensitivity automatically in response to lighting conditions.

Mode	ISO sensitivity
i, j, %	AUTO
P, S, A, M	100–6400 in steps of 1/3 EV; Hi 0.3, Hi 0.7, Hi 1, Hi 2
Other shooting modes	AUTO; 100–6400 in steps of 1/3 EV; Hi 0.3, Hi 0.7, Hi 1, Hi 2

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1Place the cursor in the information display.

If shooting information is not displayed in the monitor, press the P button. Press the P button again to place the cursor in the information display.

Information display Pbutton

2Display ISO sensitivity options.

Highlight the current ISO sensitivity in the information display and press J.

3Choose an ISO sensitivity.

Highlight an option and press J. To return to shooting mode, press the shutter-release button halfway.

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