Nikon D750 DSLR Camera (Body Only) - Manual (Page 467)

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The SB-910, SB-900, SB-800, SB-700, SB-600, SB-500, and SB-400
provide red-eye reduction, while the SB-910, SB-900, SB-800, SB-700,
SB-600, and SU-800 provide AF-assist illumination with the following
restrictions:
• SB-910 and SB-900 : AF-assist illumination is
available with 17–135 mm AF lenses,
however, autofocus is available only with
the focus points shown at right.
• SB-800, SB-600, and SU-800 : AF-assist
illumination is available with 24–105 mm
AF lenses, however, autofocus is available
only with the focus points shown at right.
• SB-700 : AF-assist illumination is available
with 24–135 mm AF lenses, however,
autofocus is available only with the focus
points shown at right.
Depending on the lens used and scene recorded, the in-focus indicator
(
I ) may be displayed when the subject is not in focus, or the camera
may be unable to focus and the shutter release will be disabled.
In mode P , the maximum aperture (minimum f-number) is limited
according to ISO sensitivity, as shown below:
Maximum aperture at ISO equivalent of:
100 200 400 800 1600 3200 6400 12800
4 4.8 5.6 6.7 8 9.5 11 13
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.
17–19 mm
20–105 mm
106–135 mm
24–34 mm
35–49 mm
50–105 mm
24–27 mm
28–135 mm