Nikon D1X - Manual (Page 106)

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OGRAPHY—EXPOSURE MODE
AF Micro Nikkor Lenses
When the sub-command dial is used to set aperture, the exposure ratio need not be taken
into account provided that an external e xposure meter is used. Compensation that takes the
exposure ratio into account is only necessary when the lens aper ture ring is used.
Shutter-Speed and Aperture Lock
Shutter-speed and aper ture can be locked at the selected setting ( pg. 94).
12—Assign Command Dial ( pg. 166)
This setting can be used to reverse the roles of the command dials so that the main command
dial controls aperture while shutter speed is assigned to the sub-command dial.
22—Aperture Setting ( pg. 173)
Use this setting when you want to adjust aperture using the lens aper ture ring. Note that
aperture for type G lenses is always set using the command dials, regardless of the option
chosen for Custom Setting 22.