Nikon SB-910 - Manual (Page 107)

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Functions
Flash value lock ( FV lock)
The SB-910 sets the fl ash output to locked fl ash exposure. This maintains the
subject’s illumination, even if the composition changes.
The flash exposure level (brightness) remains the same even when the aperture •
is changed or lens is zoomed in and out, because the flash output level
automatically changes.
Several frames can be shot during FV lock operation.
•
FV lock also functions in Advanced Wireless Lighting. •
The available flash modes are i-TTL, auto aperture flash with monitor pre-flashes •
and non-TTL auto flash with monitor pre-flashes.
FV stands for flash value, meaning flash illuminated subject exposure.
•
Slow sync
The fl ash is controlled at a low shutter speed to obtain the correct exposure for
both the main subject and background in low-light situations.
Since low shutter speeds are normally used, use of a tripod is recommended to •
prevent camera shake.
Red-eye reduction/ red-eye reduction slow sync
To prevent a subject’s eyes from appearing red in color pictures shot in low light, the
SB-910 fi res three fl ashes at reduced output moments before the picture is taken.
With red-eye reduction slow sync, red-eye reduction is combined with slow-sync •
flash.
Since low shutter speeds are normally used in red-eye reduction slow sync, use of
•
a tripod is recommended to prevent camera shake.