You can use this feature to prevent erroneous camera operation.
About the Operation Lock Feature (KEYLOCK)
Set the [KEYLOCK] switch to “ON”.
The operation lock turns on, and an operation lock icon ( 
) appears on the display screen.
The operation lock function is turned off when the [KEYLOCK] switch is set to “OFF”.
Memo
The operation lock feature is only valid in the Camera mode.
The following remote operations are possible even when the operation lock feature is turned on (“On”).
Remote operation from the wired remote control connected to the [REMOTE] terminal.
Remote operation of the camera through access via a browser on devices such as a smartphone, tablet terminal, or PC.
Operation lock does not apply to the following buttons and switches.
[POWER ON/OFF] switch
[ND FILTER] switch
[TC IN/OUT] switch
Focus Ring
Zoom Ring
Iris Ring
Zoom Lever at the Grip
Zoom Lever on Handle
[FIX/VAR/OFF] switch
Memo
Operation lock does not apply to the REC button if “Keylock Except Rec” is selected in [Camera Function] 
[KEYLOCK].
