Sony ILCE-1 Help Manual page 143

During the countdown for the self-timer
When [Focus Magnifier] is activated
When you shoot images right after the power is turned on and the camera is vertical, the first shot is taken with the horizontal
focus setting or with the last focus setting.
The orientation of the camera cannot be detected when the lens is facing up or down.
Related Topic
Selecting the focus area (Focus Area)
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