Sony a7s II How To Use Manual page 79

[Intelligent Auto]
[Superior Auto]
[Sweep Panorama]
[Scene Selection]
The higher flash effect may not be visible due to the limited amount of flash light
available, if the subject is outside the maximum range of the flash. If the subject is very
close, the lower flash effect may not be visible.
[56] How to Use
FEL Lock
The flash level is automatically adjusted so that the subject gets the optimum exposure
during normal flash shooting. You can also set the flash exposure in advance.
FEL: Flash Exposure Level
1. MENU → (Custom Settings) → [Custom Key Settings] → desired button → Select
[FEL Lock toggle] to register the function.
2. Center the subject on which FEL is to be locked, and adjust the focus.
3. Press the button to which [FEL Lock toggle] is registered, and set the flash amount.
A pre-flash flashes.
The (FEL lock) icon lights up.
4. Adjust the composition and shoot the image.
When you want to release the FEL lock, press the button to which [FEL Lock toggle]
is registered again.
Flashes that support FEL lock
HVL-F60M, HVL-F43M and HVL-F32M can be used as clip-ons, off-camera connected
by a cable, and for wireless flash shooting (controller/remote).
HVL-F20M can be used as a clip-on, off-camera connected with a cable, and for wireless
flash shooting (controller).
Note
The FEL lock cannot be set when a flash is not attached.
If a flash that does not support the FEL lock is attached, an error message is displayed.
When both AE and FEL lock are fixed,
Hint
Using shooting functions Using the flash
lights up.