Nikon D3 - Manual (Page 221)

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Auto power zoom is available with SB-800 and SB-600 flash units. The
SB–800, SB-600, and SB-400 provide red-eye reduction. When used with
AF lenses with focal lengths of 24–105 mm, the SB-800, SB-600, and
SU-800 provide active AF assist illumination for the following focus points:
In programmed auto, the maximum aperture (minimum f-number) is
limited according to sensitivity (ISO equivalency), as shown below:
For each one-step increase in sensitivity (e.g., from 200 to 400), aperture is
stopped down by half an f-stop. If the maximum aperture of the lens is
smaller than given above, the maximum value for aperture will be the
maximum aperture of the lens.
When an SC-series 17, 28, or 29 sync cable is used for off-camera flash
photography, correct exposure may not be achieved in i-TTL mode. We
recommend that you choose spot metering to select standard i-TTL flash
control. Take a test shot and view the results in the monitor.
In i-TTL, use the flash panel or bounce adapter provided with the flash
unit. Do not use other panels such as diffusion panels, as this may
produce incorrect exposure.
D
Use Only Nikon Flash Accessories
Use only Nikon Speedlights. Negative voltages or voltages over 250 V
applied to the accessory shoe could not only prevent normal operation,
but damage the sync circuitry of the camera or flash. Before using a Nikon
Speedlight not listed in this section, contact a Nikon-authorized service
representative for more information.
24–34 mm
AF lens
35–49 mm
AF lens
50–105 mm AF lens
Maximum aperture at ISO equivalent of:
200 400 800 1600 3200 6400
5 5.6 7.1 8 10 11