Autofocus with Optional Autofocus
Speedlights
Although the F4'sautofocus works at lighting levels as low as EV minus 1, performance may vary depending on subject de- tail and contrast. In dimmest light conditions, use Nikon speed- lights during AF operation, if it is too dark. The speedlight'sAF Illuminator lights up only in the Single Servo Autofocus mode.
1 . Mount Nikon Autofocus Speedlight
2.Compose picture through viewfinder and lightly press
shutter release button.
3 . Speedlight'sAF illuminator lights up and autofocus operation begins.
-The focal lengths available when using AF Illuminator with AF Nikkor lenses are 24mm to 105mm.
-For details, see Nikon speedlight instruction manual.
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