Sony A7RIII ILCE-7RM3A Operating Instructions Manual page 610

Help Guide
Interchangeable Lens Digital Camera
ILCE-7RM3A
α7RIII
Finder Frame Rate (still image)
Display the subject's movements more smoothly by adjusting the frame rate of the viewfinder during still image shooting.
This function is convenient when shooting a fast-moving subject.
MENU → (Camera Settings2) →[
1
This function can be assigned to button of your choice using [
Menu item details
High:
Displays the movements of the subject more smoothly on the viewfinder.
Standard:
Displays the subject at a normal frame rate on the viewfinder.
Note
When [ Finder Frame Rate] is set to [High], the resolution of the viewfinder is lowered.
Even when [ Finder Frame Rate] is set to [High], the setting may switch to [Standard] automatically depending on the
temperature of the shooting environment and the shooting conditions.
[
Finder Frame Rate] is locked to [Standard] in the following situations:
During playback
During HDMI connection
When the temperature inside the camera's body is high
Related Topic
Custom Key (still image/movie/playback)
Finder Frame Rate] → desired setting.
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Custom Key].