Sony ILCA-77M2 - Manual (Page 65)

Sets the method for determining the intensity of flash output.
1. MENU
→
(Camera Settings
) → [Flash control] → desired setting.
Menu item details
ADI flash (default setting):
The camera's flash control uses the focus distance information and brightness value of the subject when
the pre-flash is reflected. This gives precise flash control without hardly being affected by the reflective
level of the subject.
Pre-flash TTL:
The camera's flash control uses the brightness value of the subject when the pre-flash is reflected. If this
setting is used, the camera's ability to precisely measure the flash light may be affected by reflections
from the subject.
Manual flash:
Allows you to set the flash amount using [Power ratio], and the built-in flash fires with set amount of flash
light regardless of the brightness of a subject.
ADI: Advanced Distance Integration
TTL: Through the Lens
Hint
If you use the lens that is equipped with a distance encoder in [ADI flash] mode, the product achieves
accurate flash control based on the more precise distance information.
Note
When the distance between the subject and flash is not fixed (such as when shooting with wireless
flash using an external flash (sold separately) or in off-camera shooting using a cable, or when using
a macro twin flash), or when an external flash (sold separately) is set to bounce, [Flash control] is
automatically set to [Pre-flash TTL]. It may be automatically set to [Pre-flash TTL] depending on other
shooting conditions as well.
Set [Flash control] to [Pre-flash TTL] in the following situations because the product cannot get proper
flash information using [ADI flash].
When a wide panel is attached to the flash HVL-F36AM
When shooting using a flash diffuser
When using filters that affect the exposure factor (such as ND filters)
When using close-up lenses
ADI flash can be used in combination with a lens distance encoder. To confirm if your lens is
equipped with a distance encoder, check the main specifications of the operation manual for your
lens.
[Flash control] cannot be set in [Sweep Panorama] mode, or when [Night Scene] or [Hand-held
Twilight] is selected in [Scene Selection].
[57] How to Use Using shooting functions Using the flash
Power ratio