Nikon 900 - Manual (Page 49)

- 49 - Advanced Settings (M-REC): Extra Functions
AE LOCK (Autoexposure Lock)
Autoexposure lock is used to make a series of photographs
with consistent exposure and white balance, as for example
when making a sequence of photographs that will later used
in creating a 360-degree panorama. If autoexposure lock is
used, the autoexposure (shutter speed and aperture) and
white-balance settings for the first photograph in the series
will be used for all subsequent photographs, allowing the
photographs to be joined seamlessly into a single image.
To take a series of photographs using autoexposure lock,
select AE LOCK in the extra functions menu as described
below and turn the selector dial to M-REC. Compose the
first photograph in the series and press the shutter button all
the way down to record the image. Autoexposure and
white balance settings for M-REC mode will be locked at the
values the camera chose for this photograph. Take the
remaining photographs in the series (you may wish to use a
tripod to ensure that the photographs are taken from a
consistent height and angle), then deselect AE LOCK in the
extra functions menu to restore normal autoexposure and
white balance.
Note: White-balance settings will only be locked if auto white
balance is selected (see “White Balance,” above). At other
settings only autoexposure will be locked; the current white-
balance setting will remain in effect but cannot be changed.
While autoexposure lock is in effect and the camera is in M-
REC mode, AE-L (autoexposure lock) and WB-L (white-
balance lock) indicators will be shown in the color monitor.
Note: When autoexposure lock is in effect, the flash will
automatically by set to “Flash Cancel” and will not fire even
when lighting is inadequate.