Sony ILCE-9 a9 Help Manual page 384

Help Guide
Interchangeable Lens Digital Camera
ILCE-9
α9
Lens Comp.: Shading Comp.
Compensates for the shaded corners of the screen, caused by certain lens characteristics.
MENU → (Camera Settings1) → [Lens Comp.] → [Shading Comp.] → desired setting.
1
Menu item details
Auto:
Compensates for darker corners of the screen automatically.
Off:
Does not compensate for darker corners of the screen.
Note
This function is only available when using an automatic compensation compliant lens.
The amount of light around the edges may not be corrected, depending on the lens type.
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