Sony Alpha 7R IV Operating Instructions Manual page 510

Help Guide
Interchangeable Lens Digital Camera
ILCE-7RM4A
α7RIV
Aspect Ratio (still image)
MENU → (Camera Settings1) → [ Aspect Ratio] → desired setting.
1
Menu item details
3:2:
Same aspect ratio as 35 mm film
4:3:
The aspect ratio is 4:3.
16:9:
The aspect ratio is 16:9.
1:1:
The horizontal and vertical ratio is equal.
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