Sony A7RIII ILCE-7RM3A Operating Instructions Manual page 523

Help Guide
Interchangeable Lens Digital Camera
ILCE-7RM3A
α7RIII
AF System (still image)
Sets the focus detection system (Phase Detection AF/Contrast AF) when you attach an A-mount lens using an LA-
EA1/LA-EA3 /LA-EA5 Mount Adaptor (sold separately).
MENU → (Camera Settings1) → [
1
Menu item details
Phase Detection AF:
Focuses with Phase Detection AF. The focusing speed is faster than in [Contrast AF] mode, but focusing is limited to
within the phase detection focus area.
Contrast AF:
Always focuses with Contrast AF. You can focus anywhere on the monitor, but the focusing speed is slower than in
[Phase Detection AF] mode.
Note
When [ AF System] is set to [Contrast AF], [Continuous AF] under [Focus Mode] is unavailable.
The following functions are unavailable when [
[Center Lock-on AF]
When [ AF System] is set to [Phase Detection AF], [Priority Set in AF-S] will temporarily switch to [AF] even if it is set to
[Balanced Emphasis].
AF System] → desired setting.
AF System] is set to [Phase Detection AF]:
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