Minolta Dimage A1 - Manual (Page 71)

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Custom-white-balance function allows the camera to be calibrated to a specific lighting condition.
Three setting can be stored in the camera and used repeatedly. Custom white balance is especially
useful with mixed-lighting conditions or when critical control over color is needed.
CUSTOM WHITE-BALANCE CALIBRATION
Select a white object and fill the the center of the live image
with it; the object does not need to be in focus. Press and hold
the custom white-balance button to calibrate the camera; the
measuring area is briefly displayed before the shutter releases.
When making the calibration, the color of the object used is critical. The object should be white.
A colored object will cause the calibration to compensate for the object color rather than the
color temperature of the ambient light. A blank piece of white paper is an ideal surface and can
easily be carried in a camera bag.
Shooting tips
If an error occurs during calibration, a message will appear on the monitors. Press the controller to
cancel the message and press the menu button to cancel the register-selection screen; the custom
white-balance indicator will be yellow to indicate the error. Recalibrate using a suitable reference tar-
get. A calibration error may occur under extremely bright light sources, especially with flash units.
Use a gray card as the calibration target to reduce the intensity of the illumination.
On the register-selection screen use the control dials or
left/right keys of the controller (1) to select the custom white-
balance register in which to store the setting; any previous set-
ting is replaced. Press the central button of the controller (2) to
complete the operation. The menu button cancels the opera-
tion without saving the setting.
:enter
Select register
:select
1
2