Nikon SB-5000 Reference Manual page 5

Terminology
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Nikon Creative Lighting System (CLS)
A lighting system that enables various flash photography functions with
improved communication between Nikon Speedlights and cameras
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Unified flash control
A function that enables flash function settings to be shared by the
Speedlight and the camera
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i-TTL mode
Flash mode in which the Speedlight fires monitor pre-flashes and the
camera measures the reflected light and controls the Speedlight flash
output
i-TTL balanced fill-flash
i-TTL mode type in which flash output level is adjusted to well-
balanced exposure of the main subject and background
Standard i-TTL
i-TTL mode type in which flash output level is adjusted to the correct
exposure of the main subject regardless of background brightness
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Manual flash mode
Flash mode in which the flash output level and aperture are manually set
to obtain the desired exposure
A
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