White balance, tint and gray card

6.1

White balance#

FIG 6.1The WB rail with automatic white balance running: the mode button (1) reads AWB in white, and the WB value (2) is off-white.

The mode button (1) at the top of the WB rail shows and switches the white-balance mode. WB and TINT share one mode, so the same button sits on the TINT rail.

Button	Means	Tap it to
AWB, white	Automatic white balance running.	Lock it at the current color: AWB with a lock.
AWB with a lock, amber	Automatic white balance held at the color it had.	Resume automatic: AWB.
MWB	Manual: you set the color temperature or tint.	Return to automatic: AWB.

A tap never switches to MWB. Dragging the WB or TINT scale, or tapping a lighting preset, sets MWB (and drops a lock). The WB and TINT values read off-white only while AWB runs, and amber when locked or manual.

FIG 6.2AWB locked: the mode button (1) turns amber with a lock, and the WB value (2) turns amber.

6.2

Tint and manual white balance#

FIG 6.6The TINT rail: drag for the green-magenta balance; the value turns amber when set by you.

Set values manually

Drag the WB rail to set color temperature, or tap a lighting preset beside it. Drag TINT to adjust the green-magenta balance. A manual adjustment sets the mode button to MWB; tap it to return to automatic. White balance

6.3

Measure a gray card#

FIG 6.7The gray-card control (1) heads the WB rail's preset lane (2); here automatic white balance is running (AWB).

Open WB and tap the gray-card control (1). It is not available during a take.
Fill the whole frame with the gray card: the measurement uses the entire picture, not a center area.
Tap Lock White Balance.

Expected result: the Assist Line reads, for example, WB LOCKED · 5240K · TINT +3, and the WB rail's mode button reads MWB, holding the measured color.

FIG 6.8Measuring: the other controls fade out. The prompt (1), Lock White Balance (2) and Cancel (3) sit at the top; the corner brackets (4) mark the whole frame as the measured area.

If the Assist Line reads	Means
GRAY CARD WB FAILED — TRY AGAIN	The camera refused the measurement; white balance is unchanged.
STOP RECORDING TO USE THE GRAY CARD	Measuring is not available during a take.
RECORDING — GRAY CARD CANCELLED	A take started from the Apple Watch, a remote or a hardware button ended the measurement.

Cancel (3) leaves without changing white balance.