Nikon D300 Complete Manual page 291

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1/8000). As long as the camera will set a shutter speed

between those two extremes, the ISO value won't change.

Note that if you're using the MB-D10 grip with the proper

batteries, the maximum frame rate drops to 7.5 fps if ISO

sensitivity auto control is set to On. Frame rates don't

change if you're using EN-EL3e batteries (because they don't

reach that high).

One nice touch is that you can set the maximum ISO value

(between 400 and HI 1 [sic]) for the camera to use when ISO

sensitivity auto control is set to On. Moreover, the camera

sets the actual ISO value it picks in sixth stop increments

when this feature is active. Another nice touch is that D300

shows the ISO value being used in the viewfinder (and the

ISO-AUTO indicator blinks). The Top LCD only shows the

ISO-AUTO indicator:

If you use flash, the automatic ISO function turns off and

your previously set ISO is used! The ISO-AUTO in the

viewfinder stays lit (does not blink). This is Nikon's subtle

reminder that "more light" is better than "higher ISO."

To activate the automatic ISO option:

1. Press the MENU button to see the menu system.

2. Use the Direction pad to navigate to the SHOOTING

menu (green camera icon).

3. Use the Direction pad to navigate to ISO sensitivity

settings and press the > key on the Direction pad to

Thom Hogan's Complete Guide to the Nikon D300

Troubleshooting