Nikon D3X D3X User's Manual - Page 139

To choose the exposure mode, press the I button and rotate the main command dial until the desired mode is displayed in the viewfinder or top control panel. I button Main command dial A Depth-of-Field Preview To preview the effects of aperture, press and hold Preview button the depth-of-field preview button. The lens will Z be stopped down to the aperture value selected by the camera (modes e and f ) or the value chosen by the user (modes g and h), allowing depth of field to be previewed in the viewfinder. A Custom Setting e3-Modeling Flash This setting controls whether the SB-900, SB-800, SB-600, SB-R200, and other optional flash units that support the Creative Lighting System (CLS; see page 186) will emit a modeling flash when the depth-of-field preview button is pressed. See page 327 for more information. A See Also See page 106 for information on auto ISO sensitivity control. For information on using the [Long exp. NR] option in the shooting menu for reducing noise at slow shutter speeds, see page 300. For information on choosing the size of the increments available for shutter speed and aperture, see Custom Setting b2 ([EV steps for exposure cntrl.], pg. 314). For information on changing the roles of the main and sub-command dials, see Custom Setting f7 ([Customize command dials] > [Change main/ sub], pg. 341). 113