Nikon Z 7II Reference Manual - Page 657

D i-TTL Flash Control When an optional flash unit that supports the Nikon Creative Lighting System is attached and set to TTL, the camera uses monitor pre-flashes for balanced or standard "i-TTL fill-flash" flash control. i-TTL flash control is not available with flash units that do not support the Nikon Creative Lighting System. The camera supports the following types of i-TTL flash control: Flash control Description The camera uses "i-TTL balanced fill-flash" flash control for a natural balance between the main subject and ambient background lighting. After the shutter-release i-TTL balanced button is pressed and immediately before the main fill-flash flash, the flash unit emits a series of monitor pre- flashes which the camera uses to optimize flash output for a balance between the main subject and ambient background lighting. Flash output is adjusted to bring lighting in the frame to a standard level; the brightness of the background is Standard i-TTL not taken into account. Recommended for shots in fill-flash which the main subject is emphasized at the expense of background details, or when exposure compensation is used. • Standard i-TTL fill-flash is activated automatically when [Spot metering] is selected. Using an On-Camera Flash 615