Nikon 4807 - SB 900 Speedlight, User Manual

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About the SB-900
What is the Nikon Creative Lighting System (CLS)?
The SB-900 features the Nikon Creative Lighting System (CLS). This system offers
additional flash shooting possibilities with digital cameras by taking advantage of
your camera’s digital communication capabilities. CLS is available when the SB-900
is used with compatible Nikon cameras.
The SB-900 offers these major features:
i-TTL mode
This is a Nikon Creative Lighting System TTL auto flash mode. Monitor pre-flashes
are fired at all times. The subject is correctly exposed by the light from the flash
lighting and the exposure is less affected by ambient light (
k
D-2).
Advanced Wireless Lighting
With Advanced Wireless Lighting, wireless multiple flash operation in the TTL (i-TTL)
mode can be accomplished with CLS-compatible digital SLRs. In this mode, you
can divide the remote flash units into three groups and control the flash output
independently for each group, expanding your range of creative multiple-flash
shooting techniques (
k
D-43).
FV Lock (Flash Value Lock)
Flash Value, or “FV,” is the amount of flash exposure for the subject. Using FV Lock
with compatible cameras, you can lock in the appropriate flash exposure for the
main subject. This flash exposure is locked in, even if you change the aperture or
composition, or zoom the lens in and out. (
k
D-55).
Flash Color Information Communication
When the SB-900 is used with compatible digital SLRs, color temperature
information is automatically transmitted to the camera. In this way, the camera’s
white balance is automatically adjusted to give you the correct color temperature
when taking photographs with the SB-900.
Auto FP High-Speed Sync
High-Speed flash synchronization at a compatible camera’s highest shutter speed is
possible. This is useful when you want to use a wider aperture to achieve shallow
depth of field to blur the background (
k
D-55).
AF-Assist illuminator
In autofocus operation, the SB-900 emits AF-Assist illumination, which matches the
wider AF area of CLS-compatible cameras. With cameras supporting this function,
autofocus photography in dim lighting is possible even when the camera’s focus
point (focus area) is changed (
k
D-58).
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