Sony a7CR Help Manual page 179

Help Guide
Interchangeable Lens Digital Camera
ILCE-7CR
α7CR
AF Assist
While shooting a movie with auto focus, you can change the subject in focus by operating the focus ring of the lens.
MENU → (Focus) → [AF/MF] → [AF Assist] → [On].
1
While shooting a movie with auto focus, turn the focus ring of the lens to focus on the intended subject.
2
When you stop operating the focus ring, the subject that is in focus with the focus ring becomes the autofocus
target.
Menu item details
On:
Uses the AF assist function.
Off:
Does not use the AF assist function.
Hint
It will be easier to see which region is in focus if you use the [
making it easier for you to focus on the intended subject.
Note
Only subjects within the focus area are targeted by auto focus.
The following lenses are not compatible with [AF Assist].
SELP1650 (sold separately)
SEL18200LE (sold separately)
Related Topic
Peaking Display
Focus Map
Peaking Display] or [Focus Map] function along with [AF Assist],
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