Sony A7RIII ILCE-7RM3A Operating Instructions Manual page 293

Help Guide
Interchangeable Lens Digital Camera
ILCE-7RM3A
α7RIII
e-Front Curtain Shut.
The electronic front curtain shutter function shortens the time lag between when the shutter button is pressed and the
shutter is released.
MENU → (Camera Settings2) → [e-Front Curtain Shut.] → desired setting.
1
Menu item details
On:
Uses the electronic front curtain shutter function.
Off:
Does not use the electronic front curtain shutter function.
Note
When you shoot at high shutter speeds with a large-aperture lens attached, out-of-focus circle produced by the bokeh effect may
get cut off because of the shutter mechanism. If this happens, set [e-Front Curtain Shut.] to [Off].
When a lens made by another manufacturer (including a Minolta/Konica-Minolta lens) is used, set this function to [Off]. If you set
this function to [On], the correct exposure will not be set or the image brightness will be uneven.
When you shoot at high shutter speeds, the image brightness may become uneven depending on the shooting environment. In
such cases, set [e-Front Curtain Shut.] to [Off].
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